A phenomenon in which an element exists in different modification in same physical state is called

(a)

Isomerism

(b)

Allotropy

(c)

Catenation

(d)

Crystallinity

The carbon atoms in fullerene are arranged in mixed

(a)

Tetragon and Pentagon

(b)

Pentagon and Hexagon

(c)

Hexagon and Heptagon

(d)

Heptagon and Octagon

Diamond is not a good conductor of electricity because

(a)

it is very hard

(b)

it has no free electron

(c)

its structure is uniform

(d)

it is insoluble in water

Which of the following is highly toxic?

(a)

Carbon dioxide

(b)

Carbon monoxide

(c)

Calcium carbonate

(d)

Sodium bicarbonate

Plastics made of Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS) are made of resin code ___________

(a)

2

(b)

5

(c)

6

(d)

7

Graphite is used as lubricant in machines because

(a)

it is good conductor of electricity

(b)

it is made of slippery layers and has high melting point

(c)

it has high density

(d)

it is strong and soft

Graphene is one atom thick layer of carbon obtained from

(a)

Diamond

(b)

Fullerene

(c)

Graphite

(d)

Gas Carbon

The legal measures to prevent plastic pollution come under the ___________ Protection Act 1988.

(a)

Forest

(b)

Wildlife

(c)

Environment

(d)

Human Rights

Which of the following is prepared by heating CaO and coke?

(a)

CaC₂

(b)

CaCO₃

(c)

CO₂

(d)

CO

Which Amorphous form of carbon is used in making electrode in dry cell?

(a)

coke

(b)

gas carbon

(c)

lampblack

(d)

charcoal