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