set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

Bleaching powder gives smell of chlorine because it –

a) gives chlorine on exposure to atmosphere

b) is a mixture of chlorine and slaked lime

c) is unstable

d) contains excess of chlorine

Question : 2

Match List-I with List-II and select the correct answer using the codes given below the lists:

a) A-4; B-2; C-3; D-1

b) A-2; B-4; C-1; D-3

c) A-2; B-3; C-1; D-4

d) A-4; B-2; C-1; D-3

Question : 3

What is Neela thotha?

a) Calcium Sulphate

b) Iron Sulphate

c) Copper Sulphate

d) Sodium Sulphate

Question : 4

Which of the following is not a hydrated salt?

a) Baking soda

b) Washing soda

c) Blue vitriol

d) Epsom salt

Question : 5

Two elements gallium and oxygen combine to form a compound Ga₂O₃. Which among the following is the valency of gallium ?

a) 3

b) 1

c) 2

d) 4

Question : 6

Chemical formula of baking soda is –

a) Na₂CO₃

b) NaHCO₃

c) MgSO₄

d) MgCO₃