Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 19 - 23 of 63

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Question number: 19

» Chemistry » Physical and Chemical Changes

Match List-Ⅰ List-Ⅱ▾

Question

Match the following
List-Ⅰ (Types Of Polymers) List-Ⅱ (Uses Of Polymers)

(A)

Cotton

(i)

Non-sticking cookware

(B)

Teflon

(ii)

Appears like silk

(C)

Nylon

(iii)

Easily biodegradable

(D)

Melamine

(iv)

Flame resistant

Choices

Choice (4) Response
  • (A)
  • (B)
  • (C)
  • (D)

a.

  • (iv)
  • (ii)
  • (i)
  • (iii)

b.

  • (iii)
  • (ii)
  • (i)
  • (iv)

c.

  • (i)
  • (ii)
  • (iii)
  • (iv)

d.

  • (iv)
  • (iii)
  • (ii)
  • (i)

Question number: 20

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Consider the following changes

I. Hammering of red hot iron and make flat sheet.

II. Formation of ice by cooling water.

III. Vaporization of sea water.

The example (s) of physical change (s) is/are

Choices

Choice (4) Response

a.

I and II

b.

I, II and III

c.

I and III

d.

II and III

Question number: 21

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

Consider the following statement about natural gas

I. Its main constituent is methane.

II. It is a raw material for the manufacture of fertilizer.

III. It is eased to generate electricity. Which of the above statements is/are correct?

Choices

Choice (4) Response

a.

I, II and III

b.

Only I

c.

I and II

d.

II and III

Question number: 22

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

What will be the effect of added ammonium nitrate to soil?

Choices

Choice (4) Response

a.

The soil become alkaline

b.

Soil first become alkaline then acidic

c.

Soil first become acidic then alkaline

d.

The soil become acidic

Question number: 23

» Chemistry » Structure of Atom

MCQ▾

Question

The head of match stick contains

Choices

Choice (4) Response

a.

white phosphorus only

b.

antimony chloride + red phosphorus

c.

antimony trisulphide + potassium chlorate

d.

antimony trisulphide + potassium chloride

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