set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

Which of the following is an oxide ore?

a) Haematite

b) Bauxite

c) Cuprite

d) All of these

Question : 2

The chief ore of aluminium is

a) alunite

b) bauxite

c) cryolite

d) feldspar

Question : 3

Which one of the following is the correct order in which the gases H₂, Ne, O₂ and N₂ are evolved on fractional distillation of liquid air?

a) H₂, Ne, N₂, O₂

b) N₂, O₂, Ne, H₂

c) H₂, Ne, O₂, N₂

d) O₂, N₂, H₂, Ne

Question : 4

Which of the following materials has the highest electrical conductivity?

a) Silver

b) Graphite

c) Diamond

d) Wood

Question : 5

A glass of water does not turn into ice as it reaches 0 °C. It is because

a) a certain amount of heat must be supplied to the glass of water so as to solidify

b) a certain amount of heat must be taken out from the glass of water so as to solidify

c) water does not solidify at 0°C

d) water solidifies at 0 K only

Question : 6

Which one of the following materials is very hard and very ductile?

a) Tungsten

b) Cast iron

c) Carborundum

d) Nichrome