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  4. The homologue of ethyne is :

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Q. The homologue of ethyne is :

EAMCETEAMCET 1998

Solution:

Ethyne is the member of alkyne series whose general formula is $ {{C}_{n}}{{H}_{2n-2}} $ In $ {{C}_{n}}{{H}_{2n-2}}n= $ no. of atoms as 1, 2, 3... If $ n=2, $ then $ {{C}_{2}}{{H}_{2\times 2-2}} $ $ {{C}_{2}}{{H}_{2}}\,\text{Ethyne} $ If $ n=3, $ then $ {{C}_{3}}{{H}_{2\times 3-2}} $ $ {{C}_{3}}{{H}_{6-2}} $ $ {{C}_{3}}{{H}_{4}}\,\text{Propyne} $ So, the next member or homologue of ethyne is propyne $ ({{C}_{3}}{{H}_{4}}). $