General Chemistry (Part 4)

Question 1

The chemical name of Common salt is:

Answer 1

sodium chloride

Question 2

Denatured spirit is ethanol mixed with:

Answer 2

pyridine

Question 3

The most abundant inert gas in the atmosphere is:

Answer 3

argon

Question 4

Which metal is extracted from seawater?

Answer 4

magnesium

Question 5

Percentage of lead in lead pencils is:

Answer 5

0

Question 6

Water is not effective in extinguishing a fire caused by petrol because:

Answer 6

Water and petrol are immiscible with each other and petrol which forms the upper layer continues to burn.

Question 7

Helium gas is used in gas balloons instead of hydrogen gas because it is:

Answer 7

noncombustible

Question 8

The gas used in the artificial ripening of fruits is:

Answer 8

acetylene

Question 9

Ruby and sapphire are oxides of:

Answer 9

aluminum

Question 10

The gas which turns into liquid at the lowest temperature among the following is:

Answer 10

hydrogen

Question 11

Gunpowder consists of a mixture of:

Answer 11

nitrite sulfur and charcoal

Question 12

In nuclear reactors graphite is used as a an:

Answer 12

moderator

Question 13

Sea water can be purified by the process of:

Answer 13

distillation

Question 14

Detergents clean surfaces on the principle of:

Answer 14

surface tension

Question 15

The compound to which H2 does not add is:

Answer 15

tetraphenyl ethylene

Question 16

Ammonia is a mixture of

Answer 16

aluminum powder and ammonium nitrate

Question 17

Which gas does not form the part of atmosphere?

Nitrogen| Helium | Chlorine | None of these

Answer 17

chlorine

Question 18

The fuel used in an atomic reactor is:

Answer 18

uranium

Question 19

White coal is:

Answer 19

hydroelectricity

Question 20

The major constituent of Gobar gas is:

Answer 20

methane

Question 21

The residue left after extracting juice from sugar beet and sugarcane is called:

Answer 21

bagasse

Question 22

The isotope of Uranium used in atomic reactors is:

Answer 22

U-235

Question 23

The greenhouse effect is caused by the higher level of which gas in the atmosphere?

Answer 23

CO2

Question 24

Candle is a mixture of:

Answer 24

paraffin wax and stearic acid

Question 25

Ethanol containing 5% water is known as:

Answer 25

rectified spirit

Question 26

The important ore of aluminum is:

Answer 26

bauxite

Question 27

Aqua regia is a 1:3 mixture by volume of:

Answer 27

concentrated nitric acid and concentrated hydrochloric acid

Question 28

What is the maximum water vapor content in the atmosphere?

Answer 28

3 to 4 %

Question 29

The amount of chlorine available in water after disinfection is called as:

Answer 29

residual chlorine

Question 30

What are the major pollutants of cigarette smoke?

Answer 30

carbon monoxide and nicotine

Question 31

Nuclear energy is a mineral based energy source. It is derived from:

Answer 31

uranium

Question 32

Zinc sulfide is commonly used as:

Answer 32

rodenticide

Question 33

The purest form of water is:

Answer 33

rainwater

Question 34

The main constituent of biogas is:

Answer 34

methane

Question 35

Aspirin is chemically known as:

Answer 35

acetylsalicylic acid

Question 36

The most abundant element in the human body is:

Answer 36

oxygen

Question 37

Which of the following is not a greenhouse gas? Hydrogen | Carbon dioxide | Nitric acid | Chlorofluorocarbon

Answer 37

hydrogen

Question 38

Litmus is obtained from:

Answer 38

lichen

Question 38

Wax used for making candle is chemically a mixture of:

Answer 38

aliphatic hydrocarbons

Question 39

Vinegar made by fermentation from cane sugar contains:

Answer 39

acetic acid

Question 40

Photo oxidation process is initiated by:

Answer 40

light

Question 41

Ultraviolet radiation striking this earth is due to the depletion of:

Answer 41

ozone

Question 42

Major gaseous pollutant of the thermal power station is:

Answer 42

SO2

Question 43

The process of removing calcium and magnesium from hard water is known as:

Answer 43

water softening

Question 44

The tip of the matchstick contains:

Answer 44

red phosphorus

Question 45

Commercially sodium bicarbonate is known as:

Answer 45

baking soda

Question 46

An emulsifier is an agent which:

Answer 46

stabilizes the emulsion

Question 47

Mortar is a mixture of water sand and:

Answer 47

slaked lime

Question 48

Which of the following substance is highly plastic?

Answer 48

clay

Question 49

The National Chemical Laboratory (India) is located in:

Answer 49

Pune