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
FriendrichWohler
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
Dioxin
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
Environment
Question: 7
Graphene is one atom thick layer of carbon obtained from
(A) Graphite
(B) Gas carbon
(C) Fullerene
(D) Diamond
Ans: A
Graphite
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
7
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
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