set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following do not react with water at all?

a) Lead

b) Magnesium

c) Iron

d) None of the above

Question : 2

Of how many carats is the pure gold?

a) 24

b) 28

c) 22

d) 20

Question : 3

Cinnabar is an ore of

a) Pb

b) Hg

c) Cu

d) Zn

Question : 4

Which reducing agent is used in chemical reduction?

a) Al

b) C

c) CO

d) All of these

Question : 5

Mica is a

a) Bad conductor of both heat and electricity

b) Good conductor of heat and electricity both

c) Good conductor of heat and bad conductor of electricity

d) Bad conductor of heat and good conductor of electricity

Question : 6

Calcination is the process of heating the ore

a) in presence of air

b) in a blast furnace

c) in absence of air

d) none of these