MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Biochemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Buffer capacity is maximum when __________ |
| A. | One mole of NH<sub>4</sub>Cl is added to two moles of NH<sub>4</sub>OH |
| B. | One mole of NH<sub>4</sub>Cl is added to one moles of NH<sub>4</sub>OH |
| C. | One mole of NH<sub>4</sub>Cl is added to one mole of NaOH |
| D. | One mole of NaCl is added to one mole of NaOH |
| Answer» C. One mole of NH<sub>4</sub>Cl is added to one mole of NaOH | |
| 2. |
The buffer capacity is equal to __________ |
| A. | n / pH |
| B. | pH / n |
| C. | 1pKa |
| D. | 2pKa |
| Answer» B. pH / n | |
| 3. |
For an acid buffer solution the pH is 3. The pH can be increased by ____________ |
| A. | Increasing the concentration of salt |
| B. | Increasing the concentration of acid |
| C. | Decreasing the concentration of salt |
| D. | Independent of concentration of acid & salt |
| Answer» B. Increasing the concentration of acid | |
| 4. |
1M NaCl and 1M HCl are present in an aqueous solution. The solution is ____________ |
| A. | Not a buffer solution with pH < 7 |
| B. | Not a buffer solution with pH > 7 |
| C. | A buffer solution with pH < 7 |
| D. | A buffer solution with pH > 7 |
| Answer» B. Not a buffer solution with pH > 7 | |
| 5. |
Assertion A: pH of a buffer solution solution does not change on dilution.
|
| A. | A and R are true, R is the correct explanation of A |
| B. | A and R are true, R is not correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» B. A and R are true, R is not correct explanation of A | |
| 6. |
Which can act as buffer? |
| A. | NH<sub>4</sub> Cl + HCl |
| B. | CH<sub>3</sub> COOH + H<sub>2</sub> CO<sub>3</sub> |
| C. | 40ml of 0.1M NaCN + 20ml of 0.1M HCN |
| D. | NaCl + NaOH |
| Answer» D. NaCl + NaOH | |