MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
5 moles of liquid X and 10 moles of liquid Y make a solution having a total vapour pressure 70 torr. The vapour pressures of pure X and pure Y are 64 torr and 76 torr respectively. Which of the following is true regarding the described solution? |
| A. | The solution shows positive deviation |
| B. | The solution shows negative deviation |
| C. | The solution is ideal |
| D. | The solution has volume greater than the sum of individual volumes |
| Answer» C. The solution is ideal | |
| 2. |
If liquids A and B form an ideal solution, then what is the Gibbs free energy of mixing? |
| A. | > 0 |
| B. | < 0 |
| C. | = 0 |
| D. | Not Defined |
| Answer» C. = 0 | |
| 3. |
Which of the following is true regarding azeotropes? |
| A. | An azeotrope does not exhibit the same concentration in the vapour phase and the liquid phase |
| B. | Azeotropic mixtures cannot be separated into their constituents by fractional distillation |
| C. | In case of minimum boiling azeotropes, the boiling point of the azeotrope is higher than the boiling point of either of the pure components |
| D. | In case of maximum boiling azeotropes, the boiling point of the azeotrope is lesser than the boiling point of either of the pure components |
| Answer» C. In case of minimum boiling azeotropes, the boiling point of the azeotrope is higher than the boiling point of either of the pure components | |
| 4. |
Which of the following cannot form an azeotrope? |
| A. | H<sub>2</sub>O + C<sub>2</sub>H<sub>5</sub>OH |
| B. | CHCl<sub>3</sub> + C<sub>2</sub>H<sub>5</sub>OH |
| C. | HCl + H<sub>2</sub>O |
| D. | Benzene + Toluene |
| Answer» E. | |
| 5. |
Which of the following is true regarding non-ideal solutions with negative deviation? |
| A. | The interactions between the components are lesser than in the pure components |
| B. | V<sub>mixing</sub> = +ve |
| C. | H<sub>mixing</sub> = +ve |
| D. | They form maximum boiling azeotropes |
| Answer» E. | |
| 6. |
Which of the following is not an example of a non-ideal solution showing negative deviation? |
| A. | HNO<sub>3</sub> + Water |
| B. | HCl + Water |
| C. | Acetic acid + Pyridine |
| D. | Carbon tetrachloride + Toluene |
| Answer» E. | |
| 7. |
Ideal solutions do not form azeotropes. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following is an example of a non-ideal solution showing positive deviation? |
| A. | Acetone + Carbon disulphide |
| B. | Chlorobenzene + Bromobenzene |
| C. | Chloroform + Benzene |
| D. | Acetone + Aniline |
| Answer» B. Chlorobenzene + Bromobenzene | |
| 9. |
Which of the following is false regarding Non-Ideal solutions? |
| A. | They do not obey Raoult s law |
| B. | V<sub>mixing</sub> 0 |
| C. | H<sub>mixing</sub> = 0 |
| D. | They form azeotropes |
| Answer» D. They form azeotropes | |
| 10. |
A solution which does not obey Raoult s law is called a non-ideal solution. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
Which of the following is not an example of an Ideal solution? |
| A. | Benzene + Toluene |
| B. | n-Hexane + n-Heptane |
| C. | Ethyl alcohol + Water |
| D. | Ethyl bromide + Ethyl chloride |
| Answer» D. Ethyl bromide + Ethyl chloride | |
| 12. |
Which of the following statements regarding Ideal solutions is false? |
| A. | Ideal solutions obey Raoult s law under all conditions of temperature and concentrations |
| B. | There will be some change in volume on mixing the components, i.e., V<sub>mixing</sub> 0 |
| C. | There will be no change in enthalpy when the two components are mixed, i.e., H<sub>mixing</sub> = 0 |
| D. | There will be no change in volume on mixing the components, i.e., V<sub>mixing</sub> = 0 |
| Answer» C. There will be no change in enthalpy when the two components are mixed, i.e., H<sub>mixing</sub> = 0 | |