set 4 MCQ Questions & Answers Detailed Explanation

Question : 1

What is anode mud –

a) impurities collected at anode in electrolysis during purification of metals

b) fan of anode

c) metal of anode

d) all of these

Question : 2

Pearl is mainly constituted of

a) Calcium Sulphate

b) Calcium Carbonate

c) Calcium Oxalate

d) Calcium Oxide

Question : 3

There is no reaction when steam passes over

a) Copper

b) Carbon

c) Aluminium

d) Iron

Question : 4

Brass is a mixture of

a) copper, nickel and zinc

b) copper and zinc

c) copper and tin

d) aluminium, copper and traces of Mg and Mn

Question : 5

Which one of the following is the secondary source of light in a fluorescent lamp?

a) Argon gas

b) Mercury vapour

c) Neon gas

d) Fluorescent coating

Question : 6

Graphite is a/an –

a) metalloid

b) alloy

c) metal

d) non-metal