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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