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1
Methane is used as fuel because ______________________
It produces large amount of heat on burning
It is gas at room temperature
It is lighter than air
It is colourless
2
Which of the following compounts is the simplest hydrocarbon ?
Acetic acid
Calcium carbonate
Ethanol
Methane
3
Fullerene was first prepared by _______________________
Evaporation of graphite
Condensation of Graphite
Fullerene Ore
All of the above
4
Which fullerene is referred as Buckyball ?
C 60
C 76
C 80
C 56
5
Which of the following is not an allotrope of Carbon?
Graphite
Diamond
Fullerene
None of the above
6
Which of the following gases is produced when carbon compounds are burnt in air ?
CO
NO
7
Which of the following is a micro-crystalline form of an allotrope of Carbon?
Charcoal
8
Which of the following nutrients is not based on carbon?
carbohydrates
fats
minerals
proteins
9
The first known Fullerene was ______________.
C 70
10
Carbon is an unique element because
It is present in free and combined state
It shows allotropy
It is found in living organism
It forms a large nmber of compounds.
11
What is the estimated number of carbon compounds whose formulae are known ?
One million
Two million
Three million
One billion
12
Which of the following gases is produced when carbon compounds are heated in a limited amount of air ?
13
How many isomers of ethane are possible?
0
14
In neopentane , the second carbon of the longest chain is connected to how many carbon atoms ?
15
The chemical formula of marsh gas is _________________