Row_ID int64 1 30.2M | Topic stringclasses 3
values | Subtopic stringclasses 4
values | Question stringclasses 13
values | Answer_1 stringclasses 11
values | Explanation_1 stringclasses 12
values | Answer_2 stringclasses 11
values | Explanation_2 stringclasses 11
values | Answer_3 stringclasses 0
values | Explanation_3 stringclasses 0
values | Difficulty stringclasses 2
values |
|---|---|---|---|---|---|---|---|---|---|---|
801 | Organic Chemistry | Alkenes | HCl+2-methylpropene product? | 2-chloro-2-methylpropane | HCl adds; yields 2-chloro-2-methylpropane. | tert-butyl chloride | Same: tert-butyl chloride. | null | null | Hard |
802 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
803 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
804 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
805 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
806 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
807 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
808 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
809 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
810 | Organic Chemistry | Alkenes | HCl+2-methylpropene product? | 2-chloro-2-methylpropane | HCl adds; yields 2-chloro-2-methylpropane. | tert-butyl chloride | Same: tert-butyl chloride. | null | null | Hard |
811 | Organic Chemistry | Alkenes | HBr+1-methylcyclohexene product? | 1-bromo-1-methylcyclohexane | HBr adds; yields 1-bromo-1-methylcyclohexane. | 1-methyl-1-bromocyclohexane | Same: 1-methyl-1-bromocyclohexane. | null | null | Hard |
812 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
813 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
814 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
815 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
816 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
817 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
818 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
819 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
820 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
821 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
822 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
823 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
824 | Organic Chemistry | Alkenes | HCl+1-butene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
825 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
826 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
827 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
828 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
829 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
830 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
831 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
832 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
833 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
834 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
835 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
836 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
837 | Organic Chemistry | Alkenes | HBr+2-methylpropene product? | unknown | HBr adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
838 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
839 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
840 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
841 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
842 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
843 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
844 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
845 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
846 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
847 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
848 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
849 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
850 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
851 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
852 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
853 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
854 | Organic Chemistry | Alkenes | HCl+2-methylpropene product? | 2-chloro-2-methylpropane | HCl adds; yields 2-chloro-2-methylpropane. | tert-butyl chloride | Same: tert-butyl chloride. | null | null | Hard |
855 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
856 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
857 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
858 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
859 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
860 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
861 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
862 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
863 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
864 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
865 | Organic Chemistry | Alkenes | HBr+1-butene product? | 2-bromobutane | HBr adds; yields 2-bromobutane. | sec-butyl bromide | Same: sec-butyl bromide. | null | null | Hard |
866 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
867 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
868 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
869 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
870 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
871 | Organic Chemistry | Alkenes | HCl+2-methylpropene product? | 2-chloro-2-methylpropane | HCl adds; yields 2-chloro-2-methylpropane. | tert-butyl chloride | Same: tert-butyl chloride. | null | null | Hard |
872 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
873 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
874 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
875 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
876 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
877 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
878 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
879 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
880 | Organic Chemistry | Alkenes | HCl+1-methylcyclohexene product? | unknown | HCl adds; yields unknown. | unknown | Same: unknown. | null | null | Hard |
881 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
882 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
883 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
884 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
885 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
886 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
887 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
888 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
889 | Physical Chemistry | Kinetics | t1/2,k=0.02s^-1? | 34.6s | t1/2=0.693/0.02=34.6s. | ~35s | t1/2≈0.7/0.02=35s. | null | null | Hard |
890 | Physical Chemistry | Kinetics | t1/2,k=0.01s^-1? | 69.3s | t1/2=0.693/0.01=69.3s. | ~70s | t1/2≈0.7/0.01=70s. | null | null | Hard |
891 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
892 | Organic Chemistry | Alkenes | HBr+1-methylcyclohexene product? | 1-bromo-1-methylcyclohexane | HBr adds; yields 1-bromo-1-methylcyclohexane. | 1-methyl-1-bromocyclohexane | Same: 1-methyl-1-bromocyclohexane. | null | null | Hard |
893 | Organic Chemistry | Nomenclature | Name CH3CH(OH)CH2CHO? | 3-hydroxybutanal | CH3CH(OH)CH2CHO: 3-hydroxybutanal. | beta-hydroxybutyraldehyde | 3-hydroxybutanal=beta-hydroxybutyraldehyde. | null | null | Hard |
894 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
895 | Inorganic Chemistry | Oxidation States | Fe ox.state in [Fe(CN)6]4-? | +2 | [Fe(CN)6]4-: Fe=+2. | Fe(II) | +2=II. | null | null | Expert |
896 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
897 | Physical Chemistry | Kinetics | t1/2,k=0.05s^-1? | 13.9s | t1/2=0.693/0.05=13.9s. | ~14s | t1/2≈0.7/0.05=14s. | null | null | Hard |
898 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
899 | Physical Chemistry | Kinetics | t1/2,k=0.1s^-1? | 6.9s | t1/2=0.693/0.1=6.9s. | ~7s | t1/2≈0.7/0.1=7s. | null | null | Hard |
900 | Inorganic Chemistry | Oxidation States | Co ox.state in [Co(NH3)6]3+? | +3 | [Co(NH3)6]3+: Co=+3. | Co(III) | +3=III. | null | null | Expert |
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