MCQOPTIONS
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MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Acetic acid associates as dimers in benzene. What is the Van’t Hoff factor (i) if the degree of association of acetic acid is 50%? |
| A. | 0.25 |
| B. | 0.50 |
| C. | 0.75 |
| D. | 0.40 |
| Answer» D. 0.40 | |
| 2. |
The pH of a 2 M solution of a weak monobasic acid (HA) is 4. What is the value of the Van’t Hoff factor? |
| A. | 0.00005 |
| B. | 1.005 |
| C. | 1.0005 |
| D. | 1.00005 |
| Answer» E. | |
| 3. |
What is the Van’t Hoff Factor for 1 mole of BaCl2, assuming 100% dissociation? |
| A. | 0.33 |
| B. | 1 |
| C. | 3 |
| D. | 2 |
| Answer» D. 2 | |
| 4. |
The depression of freezing point of a solution of acetic acid in benzene is – 0.2°C. If the molality of acetic acid is 0.1 m, then find the ratio of the normal mass to the abnormal mass. (Assume Kf of acetic acid = 4.0°C m-1) |
| A. | 1.5 |
| B. | 0.8 |
| C. | 0.5 |
| D. | 0.2 |
| Answer» D. 0.2 | |
| 5. |
The Van’t Hoff Factor for a solution of glucose in water is equal to 1. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
In which of the following solutions will the Van’t Hoff Factor for the solute be lesser than 1? |
| A. | Sodium chloride in water |
| B. | Benzoic acid in benzene |
| C. | Acetic acid in benzene |
| D. | Phenol in benzene |
| Answer» B. Benzoic acid in benzene | |
| 7. |
What is the value of the Van’t Hoff factor (i) for solutes that dissociate in water? |
| A. | > 1 |
| B. | < 1 |
| C. | = 0 |
| D. | Not defined |
| Answer» B. < 1 | |