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Question
The molecular formula of the third member of the homologous series of ketones is:
(a) C4H8O
(b) C3H6O
(c) C5H10O
(d) C6H12O
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Solution
C5H10O
The molecular formula of the third member from the homologous series of ketones is C5H10O (Pentanone or C2H5-CO-C2H5).
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