Chemistry (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 7 - 13 of 144

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Question number: 7

» Chemistry » Structure of Atom

MCQ▾

Question

Calculate the mass of 1 mole of NaCl. (Given atomic mass of Na-23, Cl- 35.5)

Choices

Choice (4) Response

a.

11.2 gms

b.

11.8 gms

c.

58.5 gms

d.

56 gms

Question number: 8

» 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: 9

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

Who compared the properties of elements with notations of music and propounded ‘law of octaves’ for the classification of elements?

Choices

Choice (4) Response

a.

Newland

b.

Mendeleef

c.

Dobereiner

d.

Lothal Mayer

Question number: 10

» Chemistry » Periodic Classification of Elements

MCQ▾

Question

An element X forms and oxide X 2 O 3. In which group of Mendeleef s periodic table is this element located?

Choices

Choice (4) Response

a.

Group II

b.

Group III

c.

Group VIII

d.

Group V

Question number: 11

» 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: 12

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The latent heat of vaporization of water is

Choices

Choice (4) Response

a.

3.34 × 10 5 Equation

b.

22.5 × 10 5 Equation

c.

2.2 × 10 5 Equation

d.

None of the above

Question number: 13

» 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

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