Alkanes


 
 
Concept Explanation
 

Alkanes

Saturated Hydrocarbons or Alkanes: The hydrocarbons in which all the carbon atoms are linked by only single bonds are called saturated hydrocarbons or alkanes or paraffins. The general formula of these compounds is CnH2n+ 2,, where, n = number of carbon atoms in one molecule of a hydrocarbon. e.g. if there is only one carbon atom then its formula should be C1H2*1+2 = CH4 (methane). Similarly, if there are two carbon atoms in the saturated hydrocarbon (alkane), its formula must be C2H2*2+2 =C2H6 (ethane)

These compounds are chemically inert, i.e. less reactive and burn with blue and non-smoky flame due to their complete combustion. These compounds generally show substitution reactions.

Sample Questions
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Question : 1

How many single bonds are formed by a carbon atom in a molecule of ethane?

Right Option : B
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Question : 2

How many electrons does one molecule of ethane share ?

Right Option : B
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Question : 3

The chemical formula of marsh gas is _________________

Right Option : B
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