general concepts of chemistry - Category wise Question and Answer Practice Test with Solutions

Question : 1

Chemical formula of Aluminium sulphate is

a) Al₃(SO₄)₂

b) Al₂ (SO₄)₃

c) AlSO₄

d) None of these

Question : 2

The molecular formula P₂O₅ means that

a) there are twice as many P atoms in the molecule as there are O atoms

b) a molecule contains 2 atoms of P and 5 atoms of O

c) the ratio of the mass of P to the mass of O in the molecule is 2:5

d) the ratio of the mass of P to the mass of O in the molecule is 5 : 2

Question : 3

Which one is a bivalent ion?

a) sulphide

b) sodium

c) calcium

d) Both (b) and (c)

Question : 4

In the reaction : PbO + C ⟶ Pb + CO

a) C is reductant

b) PbO is oxidised

c) PbO is oxidant

d) Both (a) and (c)

Question : 5

The branch of chemistry which deals with study of the methods of detection and determination of elements and compounds is

a) Analytical chemistry

b) Physical chemistry

c) Nuclear chemistry

d) Bio chemistry