Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 55 - 59 of 63

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Question number: 55

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The milkiness produced on passing Equation gas through limewater is due to formation of

Choices

Choice (4) Response

a.

calcium carbide

b.

calcium oxide

c.

calcium carbonate

d.

calcium bicarbonate

Question number: 56

» Chemistry » Carbon and Its Compounds

MCQ▾

Question

The gaseous fuels

I. burn without producing smoke.

II. have low calorific value.

III. are easy to ignite.

IV. have high calorific value.

Select the correct alternative.

Choices

Choice (4) Response

a.

I and II

b.

II and III

c.

III and IV

d.

IV and II

Question number: 57

» Chemistry » Acid Bases and Salt

Matching-Pair▾

Question

Find matching pair:

Choices

Choice (4) Response

a.

Sting

Acetic acid

b.

Lemon

Citric acid

c.

Bauxite

Aluminum oxide

d.

Both b. and c. are correct

Question number: 58

» Chemistry » Periodic Classification of Elements

Appeared in Year: 2013

MCQ▾

Question

A metal carbonate X on treatment with a mineral acid liberates a gas, which when passed through aqueous solution of a substance Y gives back X. The substances Y on reaction with the gas obtained at anode during electrolysis of brine gives a compound Z which can decolourise coloured fabrics. The compounds X, Y and Z respectively are

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 59

» Chemistry » Structure of Atom

MCQ▾

Question

The size of colloidal particles in a colloid range

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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