MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When diluting acid always add |
| A. | water to acid |
| B. | acid to water |
| C. | can be both ways |
| D. | acid cannot be diluted |
| Answer» C. can be both ways | |
| 2. |
Equilibrium constant can be used to determine equilibrium concentration of equilibrium mixture knowing the |
| A. | Final concentration of products |
| B. | Final concentration of reactants |
| C. | Initial concentration of reactants |
| D. | Initial concentration of products |
| Answer» D. Initial concentration of products | |
| 3. |
Term "active mass" shows concentration of reactants and products in |
| A. | Mol.dm-3 for a dilute solution |
| B. | Mol.cm-3 for a dilute solution |
| C. | Mol.dm-3 for a concentrated solution |
| D. | Mol.cm-3 for a concentrated solution |
| Answer» B. Mol.cm-3 for a dilute solution | |
| 4. |
Relationship by which values that relate amounts of products to reactants at equilibrium can be determined, is called |
| A. | Law of conservation of mass |
| B. | Law of chemical reactions |
| C. | Law of mass action |
| D. | Active mass |
| Answer» D. Active mass | |
| 5. |
Due to high concentration of reactants, rate of forward reaction is |
| A. | lowest |
| B. | moderate |
| C. | highest |
| D. | minimal |
| Answer» D. minimal | |
| 6. |
What percentage of ammonia is given after cooling equilibrium mixture by Haber process? |
| A. | 20 percent |
| B. | 33 percent |
| C. | 100 percent |
| D. | 98 percent |
| Answer» E. | |
| 7. |
Which of following is correct representation for "active mass"? |
| A. | ( ) |
| B. | { } |
| C. | [ ] |
| D. | Bar |
| Answer» D. Bar | |
| 8. |
Rate at which reaction proceeds is directly proportional to |
| A. | Product of the active masses of products |
| B. | Product of the active masses of reactants |
| C. | Both A and B |
| D. | None of these |
| Answer» C. Both A and B | |
| 9. |
What is representation of a reversible reaction? |
| A. | Single arrow |
| B. | Double arrows |
| C. | Bar |
| D. | None of these |
| Answer» C. Bar | |
| 10. |
In equilibrium constant expression, concentration of products is taken in/on the |
| A. | Right side |
| B. | Left side |
| C. | Numerator |
| D. | Denominator |
| Answer» D. Denominator | |