Question

write the molecular formula of third member of homologous series of carbon compound with general formula CnH2n+2​

Answer 1

Answer:

The general formula

is of the alkyne series . We know that the first member of the alkyne series is ethyne

and it has 2 carbon atoms in its molecule. <br> (i) Since the first member of alkyne series has 2 carbon atopmes in the therefore, third member of alyne series will have 4 carbn atoms in its molecule . Soif wer put n=4 in the general formula

then the molecular formula of the fifth memeber of the alkyne series will be

.

Answer 2

Answer:

the molecular formula of third member of homologous series of carbon compound with general formula CnH2n+2 is C3H8