Q. 14.2( 24 Votes )

Write the next homologue of each of the following:

(i) C2H4

(ii) C4H6

Answer :

Homologous series is collection of compounds that have the same general formula, varying by a single parameter i.e. length of carbon chain. These have functional groups like alkanes, alkenes, alkynes etc.

i) C2H4- is alkene, its general formula CnH2n, so the next homologue will be:

Put n = 3 in the general formula, CnH2n

C3H3×2 = C3H6

ii) C4H6- is alkyne, its general formula CnH2n-2, so the next homologue will be:

Put n = 5 in the general formula CnH2n-2, we get,

C5H2×5-2 =C5H10-2= C5H8

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