Q. 684.6( 5 Votes )

Write the molecular formula of: (i) an alkane (ii) an alkene, and (iii) an alkyne, each having 20 carbon atoms?

Answer :

(i) The molecular formula of al alkane is CnH2n+2. Here, n is number of carbon atoms.

If number of carbon atoms (n)=20

Then, the molecular formula of alkane is C20H42.

(ii) The molecular formula of al alkene is CnH2n. Here, n is number of carbon atoms.

If number of carbon atoms (n)=20

Then, the molecular formula of alkene is C20H40.

(iii) The molecular formula of al alkyne is CnH2n-2. Here, n is number of carbon atoms.

If number of carbon atoms (n)=20

Then, the molecular formula of alkyne is C20H38.

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