Chemistry MCQs

Question 1

Gypsum is used for improvement of:

Accepted Answer

Saline soils

Answer

Alkaline soils

Answer

Podsols

Answer

Acidic soils

Question 2

Which of the following laser types is used in a laser printer?

Accepted Answer

Semiconductor laser

Answer

Dye laser

Answer

Excimer laser

Answer

Gas laser

Question 3

The chemical that is used to ripen mangoes is

Accepted Answer

Calcium carbide

Answer

Calcium sulphide

Answer

Calcium carbonate

Answer

Calcium chloride

Question 4

Exposure to mixtures of chemicals are greater than expected on the basis of effects of exposure to each chemical individually. This is known as

Accepted Answer

Synergism

Answer

Additives

Answer

Antagonism

Answer

Independent

Question 5

Which of the following is used to remove ink and rust stains on cloth?

Accepted Answer

Oxalic acid

Answer

Alcohol

Answer

Ether

Answer

Kerosene oil

Question 6

KMnO4 can be used as a/an

Accepted Answer

Disinfectant

Answer

Insecticide

Answer

Fertiliser

Answer

Pesticide

Question 7

The chemical name of 'laughing gas' is

Accepted Answer

Nitrous oxide

Answer

Nitric oxide

Answer

Nitrogen dioxide

Answer

Nitrogen pentoxide

Question 8

Laughing gas is

Accepted Answer

Nitrous oxide

Answer

Nitric oxide

Answer

Nitrogen trioxide

Answer

Nitrogen pentoxide

Question 9

Electric fuse is an alloy of

Accepted Answer

Tin and lead

Answer

Zinc and lead

Answer

Copper and iron

Answer

Carbon and tin