Gen chem

Question 1

Beryllium Sulphate is less soluble in water due to ?

(a) High inflammable energy

(b) Low Energy of dissociation

(c) Low inflammable energy

(d) ionic band

Answer 1

High inflammable energy

Question 2

Cement is made hard with

(a) dehydration

(b) hydration and dissociation of water

(c) Dissociation of water

(d) Polymerisation

Answer 2

hydration and dissociation of water

Question 3

What happens when a chemical bond is formed?

(a) energy is always absorbed

(b) energy in always released

(c) more energy is released than is absorbed

(d) energy is neither released nor absorbed

Answer 3

A

Question 4

In which of the following states maximum iron ore is found ?

(a) FeC03

(b) Fe203

(c) Fe304

(d) FeS2

Answer 4

B

Question 5

Which one of the following metals pollutes the air of a city having large number of automobiles?

Answer 5

Lead

Question 6

What is the Chemical name for baking soda?

(a) Sodium carbonate

(b) Sodium bicarbonate

(c) Sodium nitrite

(d) Sodium nitrate

Answer 6

Sodium bicarbonate

Question 7

An atomic pile is used for

(a) producing X rays

(b) conducting nuclear fission

(c) conducting thermonuclear fusion

(d) accelerating atoms

Answer 7

conducting nuclear fission

Question 8

The substance which does not expand on going from liquid state to solid state is

(a) Water

(b) Cast iron

(c) Aluminium

(d) Type metal

Answer 8

Type metal

Question 9

heart pacemakers is

Answer 9

Plutonium

Question 10

Table salt gets moist during rainy season because

(a) sodium chloride is hygroscopic

(b) sodium chloride is deliquescent

(c) sodium chloride contains some quantity of sodium iodide

(d) sodium chloride contains hygroscopic impurities like magnesium chloride

Answer 10

D

Question 11

Which of the following is used as a lubricant in heavy machines?

Answer 11

Graphite

Question 12

The anode in a dry cell consists of

(a) Copper

(b) Zinc

(c) Cadmium

(d) Graphite

Answer 12

Zinc