Samacheer Kalvi 9th Science Carbon and its Compounds Questions - 1

Question: 1

Who produced pure graphite from carbon at first?

(A) Benjamin Brodie

(B) Carl schedule

(C) Francis Bundy

(D) Smithson tenant

Ans: A

Benjamin Brodie

Question: 2

Father of modern organic chemistry is

(A) Carl schedule

(B) Smithson

(C) FriendrichWohler

(D) Benjamin Brodie

Ans: C


Question: 3

Which of the following is highly toxic?

(A) Calcium carbonate

(B) Carbon dioxide

(C) Carbon monoxide

(D) Sodium bicarbonate

Ans: C

Carbon monoxide

Question: 4

Graphite is used as lubricant in machine because

(A) It is strong and soft

(B) It has high density

(C) It is made of slippery layers and has high melting point

(D) It is good conductor of electricity

Ans: C

It is made of slippery layers and has high melting point

Question: 5

Burning of PVC releases

(A) Oxygen

(B) Monoxide

(C) Dioxin

(D) No gas

Ans: C


Question: 6

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

(A) Environment

(B) Human rights

(C) Wildlife

(D) Forest

Ans: A


Question: 7

Graphene is one atom thick layer of carbon obtained from

(A) Graphite

(B) Gas carbon

(C) Fullerene

(D) Diamond

Ans: A


Question: 8

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

(A) 2

(B) 5

(C) 6

(D) 7

Ans: D


Question: 9

Which is a safer plastic?




(D) V.Vinyl

Ans: C


Question: 10

Which is used in making electrode in dry cell?

(A) Gas carbon

(B) Lamp black

(C) Charcoal

(D) Coke

Ans: A

Gas carbon