Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 1 - 7 of 42

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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

Consider the following statements.

Choices

Choice (4) Response

a.

Dilute HC1 helps in digestion

b.

Carbonic acid is a weak acid.

c.

Distilled water conduct electricity.

d.

NaOH is a strong alkal

Question number: 3

» 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: 4

» 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: 5

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

In the reaction, 2H 2 S + SO 2

3S + 2H 2 O

Choices

Choice (4) Response

a.

SO 2 is the reducing agent

b.

H 2 S has been oxidized

c.

SO 2 has been oxidized

d.

H 2 S is the oxidising agent

Question number: 6

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The correct formula of rust is

Choices

Choice (4) Response

a.

Fe 3 O 4

b.

Fe 2 O 3. xH 2 O

c.

Fe 2 O 3

d.

Fe 3 O 4. xH 2 O

Question number: 7

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

lowering the temperature

Choices

Choice (4) Response

a.

lowering the temperature

b.

increasing the pressure and lowering the temperature

c.

increasing the pressure

d.

increasing the temperature

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