MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Acid strength increases in the order of _____________ |
| A. | HF HCl HBr HI |
| B. | HF HBr HCl HI |
| C. | HI HCl HBr HF |
| D. | HCl HF HBr HI |
| Answer» B. HF HBr HCl HI | |
| 2. |
Acetic acid s pKa is 4.2 and ammonium hydroxide pKb is 3.24. What is the pH of the ammonium acetate solution? |
| A. | 7.12 |
| B. | 7 |
| C. | 4.2 |
| D. | 7.48 |
| Answer» E. | |
| 3. |
What is the pH of the solution of sulphuric acid having a concentration of 0.01M? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 4. |
Formic acid has a concentration of 0.1M and Ka is 1.77 x 10-4. What is the value of degree of dissociation? |
| A. | 4 |
| B. | 4.2 |
| C. | 0.42 |
| D. | 42 |
| Answer» C. 0.42 | |
| 5. |
What is the hydrolysis constant of a weak acid-weak base? |
| A. | K<sub>W</sub>/K<sub>b</sub> |
| B. | K<sub>W</sub>/K<sub>a</sub> |
| C. | K<sub>W</sub>/K<sub>a</sub>K<sub>b</sub> |
| D. | 1/K<sub>a</sub>K<sub>b</sub> |
| Answer» D. 1/K<sub>a</sub>K<sub>b</sub> | |
| 6. |
Why is the aqueous solution of a salt of a weak acid and strong base is alkaline? |
| A. | utilization |
| B. | neutralization |
| C. | cationic hydrolysis |
| D. | anionic hydrolysis |
| Answer» E. | |
| 7. |
What is the reverse process of Neutralization? |
| A. | formation |
| B. | hydrolysis |
| C. | reaction |
| D. | splitting |
| Answer» C. reaction | |
| 8. |
NaCl is a ________ salt. |
| A. | Normal |
| B. | Acidic |
| C. | Basic |
| D. | Double |
| Answer» B. Acidic | |
| 9. |
A neutralization reaction results in the formation of _______________ |
| A. | salts |
| B. | acid |
| C. | base |
| D. | hydrogen |
| Answer» B. acid | |
| 10. |
Which of the following has a PH greater than 7? |
| A. | gastric juice |
| B. | vinegar |
| C. | blood plasma |
| D. | lemon juice |
| Answer» D. lemon juice | |
| 11. |
What is the pKW at 298 k? |
| A. | 14 |
| B. | 7 |
| C. | 1 |
| D. | 0 |
| Answer» B. 7 | |
| 12. |
Write pH in terms of concentration of hydrogen ion? |
| A. | [H<sup>+</sup>] = 1<sup>-pH</sup> |
| B. | [H<sup>+</sup>] = 10<sup>-pH</sup> |
| C. | [H<sup>+</sup>] = 10<sup>pH</sup> |
| D. | [H] = 10<sup>-pH</sup> |
| Answer» C. [H<sup>+</sup>] = 10<sup>pH</sup> | |
| 13. |
The ionization constant of water increases with increase in temperature. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 14. |
What is the value of the ionic product of water at 298k? |
| A. | 7 x 10<sup>-14</sup>/mol<sup>2</sup>L<sup>2</sup> |
| B. | 1 x 10<sup>-10</sup>/mol<sup>2</sup>L<sup>2</sup> |
| C. | 1 x 10<sup>-14</sup>/molL<sup>2</sup> |
| D. | 1 x 10<sup>-14</sup>/mol<sup>2</sup>L<sup>2</sup> |
| Answer» E. | |