Chemistry Multiple Choice Questions Set – 22

Question 1.

The components of water can be separated by

A. Physical methods
B. Chemical methods
C. Both A and B
D. They can not be separated

Ans: B. Chemical methods

Question 2.

Rock salt is a mineral containing

A. Potassium
B. Magnesium
C. Sodium
D. Iron

Ans: C. Sodium

Question 3.

Chemical name of common salt is

A. Sodium Chloride
B. Sodium Bicarbonate
C. Sodium
D. Sodium Oxide

Ans: A. Sodium Chloride

Question 4.

Chemical name of bleaching powder is :

A. Calcium chlorate
B. Calcium hypochlorite
C. Calcium chloro hypochlorite
D. Calcium bi chloride

Ans: B. Calcium hypochlorite

Question 5.

Which of the following is not a chemical reaction?

A. Burning of paper
B.Digestion of food
C. Conversion of water into steam
D. Burning of coal

Ans: C. Conversion of water into steam

Question 6.

Baking soda is :

A. Potassium carbonate
B. Sodium hydroxide
C. Sodium carbonate
D. Sodium bicarbonate

Ans: D. Sodium bicarbonate

Question 7.

Nitrogen forms a variety of compounds in all oxidation states ranging from

A. –3 to +5
B. –3 to +3
C. –3 to +4
D. –3 to +6

Ans: A. –3 to +5

Question 8.

The chemical formula of the laughing gas is

B. N2O
D. N2O3

Ans: B. N2O

Question 9.

Chemical formula of washing soda is

A. Na2SO4.10H2O
C. Na2CO3.10H2O
D. Ca(OH)2

Ans: C. Na2CO3.10H2O

Question 10.

Sodium Carbonate is commonly known as

A. Baking Soda
B. Washing Soda
C. Caustic Soda
D. Caustic Potash

Ans: B. Washing Soda

Question 11.

What is the covalency of nitrogen in ammonia molecule

A. 2
B. 3
C. 4
D. 5

Ans: B. 3

Question 12.

The common name for the compound having formal NaOH is

A. Caustic soda
B. Caustic potash
C. Soda ash
D. Sodium hydroxide

Ans: A. Caustic soda

Question 13.

What is the chemical name for ‘Baking Soda’ ?

A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium nitrite
D. Sodium nitrate

Ans: B. Sodium bicarbonate

Question 14.

Brine refers to :

A. Salt water
B. Sweet water
C. Pure water
D. Starch water

Ans: A. Salt water

Question 15.

What is ‘milk of magnesia’ chemically?

A. Magnesium carbonate
B. Sodium bicarbonate
C. Calcium hydroxide
D. Magnesium hydroxide

Ans: D. Magnesium hydroxide

Question 16.

Philosopher’s wool is chemically

A. Aluminium oxide
B. Magnesium oxide
C. Zinc oxide
D. Calcium oxide

Ans: C. Zinc oxide

Question 17.

The chemical name of ‘Common salt’ is

A. Sodium chloride
B. Sodium nitrate
C. Ammonium chloride
D. Calcium chloride

Ans: A. Sodium chloride

Question 18.

The chemical name of baking soda is

A. Sodium carbonate
B. Sodium bicarbonate
C. Sodium chloride
D. Sodium nitrate

Ans: B. Sodium bicarbonate

Question 19.

Which one of the following is a micro-element ?

A. Chlorine
B. Hydrogen
C. Nitrogen
D. Oxygen

Ans: A. Chlorine

Question 20.

What is the atomic number of Oxygen?

A. 5
B. 8
C. 12
D. 22

Ans: B. 8

Chemistry GK MCQs all set

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