Explore topic-wise MCQs in Biochemistry.

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
Discussion
2.

The buffer capacity is equal to __________

A. n / pH
B. pH / n
C. 1pKa
D. 2pKa
Answer» B. pH / n
Discussion
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 &amp; salt
Answer» B. Increasing the concentration of acid
Discussion
4.

1M NaCl and 1M HCl are present in an aqueous solution. The solution is ____________

A. Not a buffer solution with pH &lt; 7
B. Not a buffer solution with pH &gt; 7
C. A buffer solution with pH &lt; 7
D. A buffer solution with pH &gt; 7
Answer» B. Not a buffer solution with pH &gt; 7
Discussion
5.

Assertion A: pH of a buffer solution solution does not change on dilution. Reason R: On dilution the ration of concentration of salt and acid (or base) remains unchanged.

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
Discussion
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
Discussion