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NDQ_015737 | Wax melting is an example of a chemical reaction. | a. true, b. false | b | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015738 | The products and reactants of a chemical reaction have different atoms. | a. true, b. false | b | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015740 | All chemical reactions are reversible. | a. true, b. false | b | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015742 | Rusting is an example of a chemical change. | a. true, b. false | a | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015745 | Condensation is a type of chemical reaction. | a. true, b. false | b | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015746 | A change in temperature is a common sign of a chemical reaction. | a. true, b. false | a | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015750 | substance produced in a chemical reaction | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | e | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015751 | force of attraction that breaks and reforms in a chemical reaction | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | d | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015752 | substance that starts a chemical reaction | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | g | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015753 | example of chemical change | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | f | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015754 | balance between opposing changes | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | c | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015755 | process in which some substances become different substances | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | a | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015756 | example of a physical change | a. chemical reaction, b. melting, c. equilibrium, d. chemical bond, e. product, f. rusting, g. reactant | b | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015757 | What do the formation of rust and the formation of cottage cheese have in common? | a. Both occur very quickly, b. Both involve chemical reactions, c. Both are changes of state, d. Both are physical processes | b | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015758 | Which of the following changes does not involve chemical reactions? | a. clouds forming, b. candles burning, c. leaves turning color, d. fire extinguishers foaming | a | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015759 | During chemical reactions, atoms are | a. rearranged, b. created or destroyed, c. changed to new elements, d. two of the above | a | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015760 | There is no overall change in reactants and products whenever a chemical reaction | a. goes in just one direction, b. goes in two directions, c. reaches equilibrium, d. proceeds slowly | c | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015761 | Evidence of chemical reactions include changes in | a. state, b. color, c. temperature, d. two of the above | d | Lesson: introduction to chemical reactions
What Is a Chemical Reaction:
A chemical reaction is a process in which some substances change into different substances. Substances that start a chemical reaction are called reactants. Substances that are produced in the reaction are called products. Reactants and products ca... |
NDQ_015763 | In chemical equations, reactants and products are represented by | a. plus signs and arrows, b. elements and compounds, c. coefficients and subscripts, d. chemical symbols and chemical formulas | d | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015764 | A shorthand way of showing how atoms are rearranged in a chemical reaction is a chemical | a. symbol, b. formula, c. equation, d. letter | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015765 | When there is more than one reactant in a chemical equation, they are separated by | a. arrows, b. subscripts, c. plus signs, d. coefficients | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015766 | Which chemical equation is not balanced? | a. 2Na + Cl2 2NaCl, b. C + O2 CO2, c. NO + O2 2NO2, d. N2 + 3H2 2NH3 | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015767 | In the reaction represented by the chemical equation 2Cu + O2 2CuO, new bonds are formed in | a. 2Cu, b. O2 , c. CuO, d. none of the above | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015768 | If there is more than one product in a chemical equation, the products are separated by | a. plus signs, b. minus signs, c. equals signs, d. two-way arrows | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015769 | What is the missing coefficient in the following chemical equation? CH4 + ?O2 CO2 + 2H2 O | a. 3, b. 2, c. 1, d. 0 | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015770 | Chemical equations must be balanced because matter cannot be | a. created, b. destroyed, c. changed, d. two of the above | d | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015771 | Which chemical equation is balanced? | a. 2Na + Cl2 2NaCl, b. Na + 2Cl2 2NaCl, c. 2Na + 2Cl2 2NaCl, d. Na + Cl2 NaCl | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015772 | Which chemical equation correctly represents the reaction in which carbon combines with oxygen? | a. C2 + O2 2CO, b. C2 + 2O C2 O2, c. C + O2 CO2, d. 2C + O C2 O | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015773 | What is the missing coefficient in the following chemical equation? ?NO + O2 2NO2 ? | a. 0, b. 1, c. 2, d. 4 | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015783 | The symbol 2O2 represents two molecules of oxygen. | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015785 | A coefficient of 1 usually is not written. | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015787 | Subscripts are used to balance chemical equations. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015789 | The general form of a chemical equation is Reactants = Products. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015790 | The first step in balancing a chemical equation is counting atoms. | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015791 | A chemical equation must balance only when the reaction reversible. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015792 | The symbol CO2 represents two molecules of carbon monoxide. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015793 | The symbol 2H2 represents two atoms of hydrogen. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015794 | Coefficients are used to balance chemical equations. | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015795 | In balancing chemical equations, you should use the smallest subscripts possible. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015796 | The number of each type of molecule must be the same on both sides of a chemical equation. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015797 | Changing coefficients changes the substances involved in a chemical reaction. | a. true, b. false | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015798 | Chemists use a standard method to represent chemical reactions. | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015799 | The chemical equation H2 CO3 H2 O + CO2 is balanced. | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015800 | Water is the reactant in the chemical equation H2 O H2 + O2 . | a. true, b. false | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015801 | symbolic representation of a chemical reaction | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | d | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015802 | example of a coefficient | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | e | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015803 | symbol of a chemical compound | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | g | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015804 | example of a subscript | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | c | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015805 | number showing how many atoms or molecules of a given element or compound are involved in a chemical | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | b | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015806 | symbol of an chemical element | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | a | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015807 | number showing how many atoms of a given element are in a molecule | a. chemical symbol, b. coefficient, c. H2, d. chemical equation, e. 2H, f. subscript, g. chemical formula | f | Lesson: chemical equations
Writing Chemical Equations:
A chemical equation is a symbolic representation of a chemical reaction. It is a shorthand way of showing how atoms are rearranged in the reaction. The general form of a chemical equation was introduced in this chapters lesson "Introduction to Chemical Reactions."... |
NDQ_015808 | one reactant breaking down into two or more products | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | c | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015809 | The general equation for a synthesis reaction is | a. AB A + B, b. A + BC B + AC, c. A+BC, d. AB + C A + BC | c | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015810 | ions changing places in two compounds | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | e | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015811 | Which of the following is a decomposition reaction? | a. 2Na + Cl2 2NaCl, b. 2H2 O 2H2 + O2, c. CH4 + O2 CO2 + H2 O, d. NaCl + AgF NaF + AgCl | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015812 | two reactants combining to form a single product | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015813 | Which type of reaction is represented by the following chemical equation? 2K + 2H2 O 2KOH + H2 | a. double replacement, b. single replacement, c. decomposition, d. synthesis | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015814 | Which of the following is always a product of a combustion reaction? | a. water, b. ashes, c. smoke, d. oxygen | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015815 | substance reacting quickly with oxygen | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015816 | one of the reactants in a combustion reaction | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | g | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015817 | In living cells, energy is produced by the process called | a. photosynthesis, b. sugar synthesis, c. cellular respiration, d. glucose decomposition | c | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015819 | one ion taking the place of another in a compound | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | d | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015820 | another term for a combustion reaction | a. synthesis reaction, b. combustion reaction, c. decomposition reaction, d. single replacement reaction, e. double replacement reaction, f. burning, g. fuel | f | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015822 | Which of the following is an example of a synthesis reaction? | a. 2NO + O2 2NO2, b. 2Na + Cl2 2NaCl2, c. H2 O H2 + O2, d. two of the above | d | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015825 | A decomposition reaction is represented by the general equation | a. A + B + C AB + C, b. A + BC AB + C, c. AB A + B, d. none of the above | c | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015827 | Which type of reaction is represented by the following chemical equation? NaCl + AgF NaF + AgCl | a. synthesis, b. decomposition, c. single replacement, d. double replacement | d | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015828 | A synthesis reaction occurs when two or more reactants combine to form a single product. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015829 | Which of the following is always a reactant in a combustion reaction? | a. water, b. oxygen, c. carbon dioxide, d. two of the above | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015830 | Another term for a combustion reaction is decomposition. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015831 | Methane is a | a. hydrocarbon, b. component of natural gas, c. compound containing only carbon and hydrogen, d. all of the above | d | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015832 | What do living cells use for fuel? | a. oxygen, b. water, c. glucose, d. hydrocarbons | c | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015833 | Fossil fuels such as oil and natural gas consist of hydrocarbons. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015834 | The reaction in which carbon dioxide and water combine to form glucose | a. is a combustion reaction, b. is called photosynthesis, c. takes place in all living cells, d. all of the above | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015835 | The fuel that cells use for energy is oxygen. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015836 | Plants combine carbon dioxide and water to form glucose. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015837 | Water decomposes when an electric current passes through it. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015838 | A combustion reaction usually gives off heat and light. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015839 | The burning of glucose in cells is called cellular combustion. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015840 | Sodium chloride forms in a decomposition reaction. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015841 | Methane and oxygen combine in a synthesis reaction. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015842 | One product of the reaction in question 5 is carbon dioxide. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015843 | There are two types of decomposition reactions. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015844 | Carbon dioxide forms only in combustion reactions. | a. true, b. false | b | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015845 | The general equation AB + CD AD + CB represents a replacement reaction. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015846 | The chemical reaction 2K + 2H2 O 2KOH + H2 is a replacement reaction. | a. true, b. false | a | Lesson: types of chemical reactions
Synthesis Reactions:
A synthesis reaction occurs when two or more reactants combine to form a single product. A synthesis reaction can be represented by the general equation: A+B !C In this general equation (and others like it in this lesson), the letters A, B,C, and so on represent... |
NDQ_015854 | Which statement describes a role of energy in chemical reactions? | a. Energy is created in exothermic reactions, b. Energy is always released in chemical reactions, c. Energy is needed for chemical reactions to start, d. Energy is destroyed in endothermic reactions | c | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015855 | All chemical reactions need energy to | a. form bonds in products, b. break bonds in reactants, c. get started, d. two of the above | d | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015856 | The energy needed for photosynthesis is in the form of | a. glucose, b. oxygen, c. light, d. heat | c | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015857 | Which statement about exothermic reactions is false? | a. They need activation energy, b. They include combustion, c. They give off energy, d. They take in heat | d | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015858 | When products have less chemical energy than reactants, a chemical reaction | a. is endothermic, b. is exothermic, c. absorbs energy, d. two of the above | b | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015859 | A constant input of energy is needed in | a. exothermic reactions, b. endothermic reactions, c. all chemical reactions, d. none of the above | b | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015860 | You can increase the rate of a chemical reaction by | a. increasing the temperature of reactants, b. decreasing the surface area of reactants, c. decreasing the concentration of reactants, d. all of the above | a | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015861 | According to the law of conservation of energy, energy | a. cannot be created, b. cannot be destroyed, c. cannot change form, d. two of the above | d | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015862 | Factors that affect reaction rates include | a. temperature, b. concentration, c. surface area, d. all of the above | d | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015863 | A catalyst | a. can catalyze just one chemical reaction, b. is always changed in a chemical reaction, c. becomes a product in a chemical reaction, d. helps reactants come together in a chemical reaction | d | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015865 | Crushing a solid reactant into a powder will | a. decrease the reactants surface are, b. increase the rate of the reaction, c. decrease the concentration of products, d. increase the temperature of reactants | b | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015866 | Which statement about catalysts is true? | a. They change the rate of chemical reactions, b. They are reactants in chemical reactions, c. They are used up in chemical reactions, d. two of the above | a | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015868 | energy stored in chemical bonds | a. activation energy, b. catalyst, c. concentration, d. endothermic, e. exothermic, f. reaction rate, g. chemical energy | g | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015871 | substance that speeds up chemical reactions | a. activation energy, b. catalyst, c. concentration, d. endothermic, e. exothermic, f. reaction rate, g. chemical energy | b | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
NDQ_015873 | turning out heat | a. activation energy, b. catalyst, c. concentration, d. endothermic, e. exothermic, f. reaction rate, g. chemical energy | e | Lesson: chemical reactions and energy
Endothermic Reactions:
In an endothermic reaction, it takes more energy to break bonds in the reactants than is released when new bonds form in the products. The word "endothermic" literally means "taking in heat." A constant input of energy, often in the form of heat, is needed i... |
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