Chemistry (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 61 - 63 of 63

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Question number: 61

» Chemistry » Acid Bases and Salt

MCQ▾

Question

When a base is dissolved in water

Choices

Choice (4) Response

a.

no change in concentration of OH- ions per unit volume occurs

b.

concentration of OH- ions per unit volume increases

c.

concentration of OH- ions per unit volume may increase or decrease depending upon the nature of the base

d.

concentration of OH- ions per unit volume decreases

Question number: 62

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The milkiness produced on passing CO2 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: 63

» 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

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