Chemistry Practice Questions & Answers

What is the atomic number of Oxygen?

What is the atomic number of Oxygen?

A).  5

B).  8

C).  12

D).  22

Philosopher’s wool is chemically

Philosopher’s wool is chemically

A).  Aluminium oxide

B).  Magnesium oxide

C).  Zinc oxide

D).  Calcium oxide

The common name for the compound having formal NaOH is

The common name for the compound having formal NaOH is

A).  Caustic soda

B).  Caustic potash

C).  Soda ash

D).  Sodium hydroxide

The chemical formula of the laughing gas is

The chemical formula of the laughing gas is

A).  NO

B).  N₂O

C).  NO₂

D).  N₂O₃

Chemical name of bleaching powder is :

Chemical name of bleaching powder is :

A).  Calcium chlorate

B).  Calcium hypochlorite

C).  Calcium chloro hypochlorite

D).  Calcium bi chloride

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