Carbon - Different Forms NDA Questions

NDA Chemistry

Carbon - Different Forms MCQ Questions


1.

What is the hybridization state of the carbon atoms in benzene?

A.

sp2

B.

sp3

C.

sp4

D.

sp5

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ANSWER :

A. sp2

2.
Which one of the alkaline earth metal carbonates is thermally the most stable?
A.
Magnesium carbonate
B.
Calcium carbonate
C.
Strontium carbonate
D.
Barium carbonate
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ANSWER :
D. Barium carbonate
3.
Which of the following is an example of an aromatic hydrocarbon?
A.
Butane
B.
Propane
C.
Toluene
D.
Hexene
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ANSWER :
C. Toluene
4.
What are hydrocarbons primarily composed of?
A.
Carbon dioxide
B.
Sodium and chlorine atoms
C.
Oxygen and nitrogen atoms
D.
Carbon and hydrogen atoms
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ANSWER :
D. Carbon and hydrogen atoms
5.
The increase in carbon dioxide content in the atmosphere lead to the increase in _____, and thus raise the temperature of the atmosphere.
A.
Condensation
B.
Perspiration
C.
Green house effect
D.
Photosynthesis
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ANSWER :
C. Green house effect
6.
In 1985, third form of carbon known as _____ was discovered by H.W.Kroto, E.Smalley and R.F.Curl
A.
Bonding
B.
Lead
C.
Tin
D.
Fullerenes
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ANSWER :
D. Fullerenes