A) \[{{C}_{2}}{{H}_{2}}\]
B) \[{{C}_{2}}{{H}_{6}}\]
C) \[{{C}_{3}}{{H}_{8}}\]
D) \[{{C}_{3}}{{H}_{4}}\]
Correct Answer: D
Solution :
Ethyne is nothing but \[{{C}_{2}}{{H}_{2}}\] ie, acetylene which can be represented by general molecular formula \[{{C}_{n}}{{H}_{2n-2}}\]. Only \[{{C}_{3}}{{H}_{4}}\] tallies with the formula. Hence, \[{{C}_{3}}{{H}_{4}}\] is the homologue of \[{{C}_{2}}{{H}_{2}}\].
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