NEET (NTA)-National Eligibility cum Entrance Test (Medical) Chemistry: Questions 984 - 990 of 1259

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Question number: 984

» Surface Chemistry » Colloidal State » Preparation and Properties of Colloids

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MCQ▾

Question

The stability of lyophobic colloids is due to?

Choices

Choice (4)Response

a.

A layer of medium of dispersion on their particles

b.

Smaller size of their particles

c.

Large size of their particles

d.

Charge on their particles

Question number: 985

» Classification of Elements & Periodicity » S, P, D and F Block Elements

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MCQ▾

Question

Cerium (58), Ce is member of

Choices

Choice (4)Response

a.

p – block

b.

f – block

c.

e– block

d.

s- block

Question number: 986

» Purification & Characteristics of Organic Compounds » Purification » Chromatography

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MCQ▾

Question

Latest technique for purification, isolation, and separation of organic compound is?

Choices

Choice (4)Response

a.

Chromatography

b.

Crystallisation

c.

Steam distillation

d.

Vacuum distillation

Question number: 987

» Equilibrium » Equilibrium Constants (Kp and Kc)

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MCQ▾

Question

For the hypothetical reactions, the equilibrium constant value are given , What is the equilibrium constant (K) for reaction ?

Choices

Choice (4)Response

a.

6

b.

24

c.

12.7

d.

48

Question number: 988

» Equilibrium » Ionic Equilibrium » Hydrolysis of Salts and pH of Their Solutions

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MCQ▾

Question

What will be the pH value of 0.05 M solution?

Choices

Choice (4)Response

a.

1

b.

12

c.

13

d.

12.96

Question number: 989

» Equilibrium » Ionic Equilibrium » Buffer Solutions

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MCQ▾

Question

The pH of a buffer solution prepared by adding 10 mL of 0.1 M and 20 mL of 0.1 M sodium acetate will be? Given

Choices

Choice (4)Response

a.

4.05

b.

3.05

c.

5.04

d.

3.04

Question number: 990

» Solutions » Relative Lowering of Vapour Pressure

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MCQ▾

Question

Calculate the vapor pressure lowering called by addition of 50 g of sucrose (mol mass 342) to 500 g water if the vapor pressure of pure water at is 23.8 mm Hg?

Choices

Choice (4)Response

a.

12.40 mm Hg

b.

1.024 mm Hg

c.

0.124 mm Hg

d.

1.240 mm Hg

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