Question 2 - Past Year - 3 Mark Questions - Chapter 4 Class 10 - Carbon and its Compounds

Last updated at August 14, 2026 by

Which compounds are called (i) alkanes, (ii) alkenes and (iii) alkynes? C 4 H 10 belongs to which of these? Draw two structural isomers of this compound.

 

Answer

  • Alkanes are saturated hydrocarbons i.e. they only contain C-C single bonds. They have a general formula C n H 2n +2 .
  • Alkenes are unsaturated hydrocarbons i.e. they contain C-C double bonds too. They have a general formula C n H 2n .
  • Alkynes are also unsaturated hydrocarbons i.e. they contain C-C triple bonds . They have a general formula of C n H 2n -2 .

Since C 4 H 10 corresponds to the general formula C n H 2n +2 , it is an alkane.

The structural isomers of butane (C 4 H 10 ) are as follows:

Structural isomers of Butane (C4H10) - Teachoo.png

Note: Structural isomers are compounds having the same molecular formula but different molecular structures.

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Transcript

Which compounds are called (i) alkanes, (ii) alkenes and (iii) alkynes? C4H10 belongs to which of these? Draw two structural isomers of this compound. Answer Alkanes are saturated hydrocarbons i.e. they only contain C-C single bonds. They have a general formula CnH2n+2. Alkenes are unsaturated hydrocarbons i.e. they contain C-C double bonds too. They have a general formula CnH2n. Alkynes are also unsaturated hydrocarbons i.e. they contain C-C triple bonds. They have a general formula of CnH2n-2. Since C4H10 corresponds to the general formula CnH2n+2, it is an alkane. The structural isomers of butane (C4H10) are as follows: Structural isomers of Butane (C4H10) Note: Structural isomers are compounds having the same molecular formula but different molecular structures.

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