Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 7 of 44

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 1058 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 450.00 or

Question number: 1

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of the following is an example of a chemical change?

Choices

Choice (4) Response

a.

Sublimation

b.

Rusting of iron

c.

Evaporation of water

d.

Dissolution of salt in water

Question number: 2

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

On adding ethanoic acid to NaHC0 3, what will happen?

Choices

Choice (4) Response

a.

NO 2 gas is evolved

b.

CO 2 gas is evolved

c.

O 2 gas is evolved

d.

SO 2 gas is evolved

Question number: 3

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

On adding dilute HCl to granulated zinc placed in a test tube, the observation made is

Choices

Choice (4) Response

a.

the surface of the metal turns shining

b.

the reaction mixture turns milky.

c.

a colorless and odourless gas evolves with bubbles.

d.

odour of chlorine is observed.

Question number: 4

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The latent heat of vaporization of water is

Choices

Choice (4) Response

a.

3.34 × 10 5Equation

b.

22.5 × 10 5Equation

c.

2.2 × 10 5Equation

d.

None of the above

Question number: 5

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Evaporation of liquid occur at

Choices

Choice (4) Response

a.

all temperature

b.

boiling point

c.

fixed temperature lower than the boiling point

d.

All of the above

Question number: 6

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

An element is determined by the number of

Choices

Choice (4) Response

a.

atoms

b.

electrons

c.

neutrons

d.

protons

Question number: 7

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Which of the following is not a chemical reaction?

Choices

Choice (4) Response

a.

Rusting of iron

b.

Digestion of food in our body

c.

Dissolution of sugar in water

d.

Souring of milk

f Page
Sign In