Water,pH and Macromolecules MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Water,pH and Macromolecules, a fundamental topic in the field of Biochemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Water,pH and Macromolecules MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Water,pH and Macromolecules mcq questions that explore various aspects of Water,pH and Macromolecules problems. Each MCQ is crafted to challenge your understanding of Water,pH and Macromolecules principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Water,pH and Macromolecules MCQs are your pathway to success in mastering this essential Biochemistry topic.

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So, are you ready to put your Water,pH and Macromolecules knowledge to the test? Let's get started with our carefully curated MCQs!

Water,pH and Macromolecules MCQs | Page 6 of 8

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Q51.
The hydrolysis constant of CH₃COONa is given by

a.

Kh = Kw/Ka

b.

Kh = Kw/Kb

c.

Kh = Kw/Ka×Kb

d.

Kh = Ka + Kb

Discuss
Answer: (a).Kh = Kw/Ka
Q52.
K1 and K2 for oxalic acid are 6.5×10⁻² and 6.1×10⁻⁵ respectively. What will be the [OH⁻] in a 0.01M solution of sodium oxalate?

a.

9.6×10⁻⁶

b.

1.4×10⁻¹

c.

1.2×10⁻⁶

d.

1.3×10⁻⁸

Discuss
Answer: (c).1.2×10⁻⁶
Q53.
If pKb for fluoride at 25°c is 10.83, the ionization constant of hydrofluoric acid in water at this temperature is?

a.

3.52×10⁻³

b.

6.75×10⁻⁴

c.

5.38×10⁻²

d.

1.74×10⁻⁵

Discuss
Answer: (b).6.75×10⁻⁴
Q54.
Aqueous solution of the detergents are _________

a.

Neutral

b.

Acidic

c.

Basic

d.

Amphoteric

Discuss
Answer: (c).Basic
Q55.
If pH of solution of NaOH is 12.0 the pH of H₂SO₄ solution of same molarity will be?

a.

2.0

b.

12.0

c.

1.7

d.

10.0387

Discuss
Answer: (c).1.7
Q56.
Which can act as buffer?

a.

NH₄Cl + HCl

b.

CH₃COOH + H₂CO₃

c.

40ml of 0.1M NaCN + 20ml of 0.1M HCN

d.

NaCl + NaOH

Discuss
Answer: (c).40ml of 0.1M NaCN + 20ml of 0.1M HCN
Q57.
Calculate the pH of a mixture of 0.10M acetic acid and 0.20M sodium acetate. The pKₐ of acetic acid is 4.76.

a.

5.1

b.

4.1

c.

6.1

d.

7.1

Discuss
Answer: (a).5.1
Q58.
Calculate the pKₐ of lactic acid, given that when the concentration of lactic acid is 0.010M and the concentration of lactate is 0.087M, the pH is 4.80.

a.

4.0

b.

3.9

c.

3.3

d.

4.1

Discuss
Answer: (b).3.9
Q59.
Calculate the ratio of the concentrations of acetate and acetic acid required in a buffer system of pH 5.30.

a.

3.2

b.

3.3

c.

3.4

d.

3.5

Discuss
Answer: (d).3.5
Q60.
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

Discuss
Answer: (a).A and R are true, R is the correct explanation of A
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