| Question_Number,Exam_Name,subject,Category_Domain,passage_context,Question_Text,figure1,figure2,figure3,Options,Answer_label,Correct_Answer_Text | |
| act_sci_001,act,science,earth_environmental,"Dyes such as Congo red are often found in industrial wastewater and must be removed before the water can be discharged. Scientists performed 3 experiments to determine how much Congo red would be removed from a solution by binding to particles of bentonite (B), which is a type of clay, or to particles of a chemically modified bentonite (MB). In each trial of each experiment, Steps 1- 5 were performed: 1. A 50~mL volume of an aqueous 300~mg / L Congo red solution having a particular pH was placed in each of 2 flasks. A specific mass of B was added to one flask, and the same mass of MB was added to the other flask. 2. The flasks were sealed and shaken at a speed of 200 revolutions per minute for a certain length of time at 25^{°}C . 3. The contents of each flask were filtered to remove all solid material. 4. The concentration of Congo red remaining in the solution from each flask was measured. 5. The percent of Congo red that had been removed (%) CR removed) from the solution was calculated for each flask.","In each trial, the flasks were most likely shaken to:",images/act_sci_001_41_0.jpg,images/act_sci_001_41_1.jpg,images/act_sci_001_41_2.jpg,"{'A': 'increase the concentration of B and of MB in the solution.', 'B': 'decrease the concentration of B and of MB in the solution.', 'C': 'maximize the contact between the Congo red and the particles of B and of MB.', 'D': 'minimize the contact between the Congo red and the particles of B and of MB.'}",C,maximize the contact between the Congo red and the particles of B and of MB. | |
| act_sci_002,act,science,earth_environmental,"Dyes such as Congo red are often found in industrial wastewater and must be removed before the water can be discharged. Scientists performed 3 experiments to determine how much Congo red would be removed from a solution by binding to particles of bentonite (B), which is a type of clay, or to particles of a chemically modified bentonite (MB). In each trial of each experiment, Steps 1- 5 were performed: 1. A 50~mL volume of an aqueous 300~mg / L Congo red solution having a particular pH was placed in each of 2 flasks. A specific mass of B was added to one flask, and the same mass of MB was added to the other flask. 2. The flasks were sealed and shaken at a speed of 200 revolutions per minute for a certain length of time at 25^{°}C . 3. The contents of each flask were filtered to remove all solid material. 4. The concentration of Congo red remaining in the solution from each flask was measured. 5. The percent of Congo red that had been removed (%) CR removed) from the solution was calculated for each flask.","Suppose that, in an additional trial of Experiment 3, a shaking time of 100min had been tested. The % CR removed by MB in this trial would most likely have been between:",images/act_sci_002_41_0.jpg,images/act_sci_002_41_1.jpg,images/act_sci_002_41_2.jpg,"{'A': '$10\\%$ and $20\\%$', 'B': '$20\\%$ and $30\\%$', 'C': '$70\\%$ and $80\\%$', 'D': '$80\\%$ and $90\\%$'}",D,80% and 90% | |
| act_sci_003,act,science,earth_environmental,"Dyes such as Congo red are often found in industrial wastewater and must be removed before the water can be discharged. Scientists performed 3 experiments to determine how much Congo red would be removed from a solution by binding to particles of bentonite (B), which is a type of clay, or to particles of a chemically modified bentonite (MB). In each trial of each experiment, Steps 1- 5 were performed: 1. A 50~mL volume of an aqueous 300~mg / L Congo red solution having a particular pH was placed in each of 2 flasks. A specific mass of B was added to one flask, and the same mass of MB was added to the other flask. 2. The flasks were sealed and shaken at a speed of 200 revolutions per minute for a certain length of time at 25^{°}C . 3. The contents of each flask were filtered to remove all solid material. 4. The concentration of Congo red remaining in the solution from each flask was measured. 5. The percent of Congo red that had been removed (%) CR removed) from the solution was calculated for each flask.","In Experiment 2, the % CR removed by B from the neutral Congo red solution was closest to which of the following?",images/act_sci_003_41_0.jpg,images/act_sci_003_41_1.jpg,images/act_sci_003_41_2.jpg,"{'A': '$10\\%$', 'B': '$20\\%$', 'C': '$90\\%$', 'D': '$100\\%$'}",B,20% | |
| act_sci_004,act,science,earth_environmental,"Dyes such as Congo red are often found in industrial wastewater and must be removed before the water can be discharged. Scientists performed 3 experiments to determine how much Congo red would be removed from a solution by binding to particles of bentonite (B), which is a type of clay, or to particles of a chemically modified bentonite (MB). In each trial of each experiment, Steps 1- 5 were performed: 1. A 50~mL volume of an aqueous 300~mg / L Congo red solution having a particular pH was placed in each of 2 flasks. A specific mass of B was added to one flask, and the same mass of MB was added to the other flask. 2. The flasks were sealed and shaken at a speed of 200 revolutions per minute for a certain length of time at 25^{°}C . 3. The contents of each flask were filtered to remove all solid material. 4. The concentration of Congo red remaining in the solution from each flask was measured. 5. The percent of Congo red that had been removed (%) CR removed) from the solution was calculated for each flask.","Based on the results of Experiments 2 and 3, the % CR removed would likely be greatest for which of the following combinations of pH and shaking time?",images/act_sci_004_41_0.jpg,images/act_sci_004_41_1.jpg,images/act_sci_004_41_2.jpg,"{'A': '$\\mathrm{pH}:5.0$ Shaking time: $60\\mathrm{min}$', 'B': '$\\mathrm{pH}:5.0$ Shaking time: $240\\mathrm{min}$', 'C': '$\\mathrm{pH}:10.0$ Shaking time: $60\\mathrm{min}$', 'D': '$\\mathrm{pH}:10.0$ Shaking time: $240\\mathrm{min}$'}",B,pH:5.0 Shaking time: 240min | |
| act_sci_005,act,science,earth_environmental,"Dyes such as Congo red are often found in industrial wastewater and must be removed before the water can be discharged. Scientists performed 3 experiments to determine how much Congo red would be removed from a solution by binding to particles of bentonite (B), which is a type of clay, or to particles of a chemically modified bentonite (MB). In each trial of each experiment, Steps 1- 5 were performed: 1. A 50~mL volume of an aqueous 300~mg / L Congo red solution having a particular pH was placed in each of 2 flasks. A specific mass of B was added to one flask, and the same mass of MB was added to the other flask. 2. The flasks were sealed and shaken at a speed of 200 revolutions per minute for a certain length of time at 25^{°}C . 3. The contents of each flask were filtered to remove all solid material. 4. The concentration of Congo red remaining in the solution from each flask was measured. 5. The percent of Congo red that had been removed (%) CR removed) from the solution was calculated for each flask.","Based on Figure 2 and additional information in the passage, how many trials were performed in Experiment 2?",images/act_sci_005_41_0.jpg,images/act_sci_005_41_1.jpg,images/act_sci_005_41_2.jpg,"{'A': 'Two; in each trial, the $\\%$ CR removed was determined for either B or MB at each of $6\\mathrm{pH}$ values.', 'B': 'Six; in each trial, the $\\%$ CR removed was determined for both B and MB at $1$ of $6\\mathrm{pH}$ values.', 'C': 'Twelve; in each trial, the $\\%$ CR removed was determined for either B or MB at $1$ of $6\\mathrm{pH}$ values.', 'D': 'Eighteen; in each trial, the $\\%$ CR removed was determined for either B, MB, or Congo red at $1$ of $6\\mathrm{pH}$ values.'}",B,"Six; in each trial, the % CR removed was determined for both B and MB at 1 of 6pH values." | |
| act_sci_006,act,science,earth_environmental,"Dyes such as Congo red are often found in industrial wastewater and must be removed before the water can be discharged. Scientists performed 3 experiments to determine how much Congo red would be removed from a solution by binding to particles of bentonite (B), which is a type of clay, or to particles of a chemically modified bentonite (MB). In each trial of each experiment, Steps 1- 5 were performed: 1. A 50~mL volume of an aqueous 300~mg / L Congo red solution having a particular pH was placed in each of 2 flasks. A specific mass of B was added to one flask, and the same mass of MB was added to the other flask. 2. The flasks were sealed and shaken at a speed of 200 revolutions per minute for a certain length of time at 25^{°}C . 3. The contents of each flask were filtered to remove all solid material. 4. The concentration of Congo red remaining in the solution from each flask was measured. 5. The percent of Congo red that had been removed (%) CR removed) from the solution was calculated for each flask.",Consider the description of Experiment 1 and the % CR removed by MB in the 0.200g trial of Experiment 1. The concentration of Congo red that remained in the solution when the shaking ended was approximately:,images/act_sci_006_41_0.jpg,images/act_sci_006_41_1.jpg,images/act_sci_006_41_2.jpg,"{'A': '$0\\mathrm{mg / L}$', 'B': '$100\\mathrm{mg / L}$', 'C': '$200\\mathrm{mg / L}$', 'D': '$300\\mathrm{mg / L}$'}",A,0mg / L | |