In which of the following reactions, an aldehyde is formed as major product?
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a
b
CH3−CH2−C≡CH+KMnO4→ColdH2O
c
CH3−CH2CH2CH2−OH+Cu⟶Δ
d
CH3−CH2CH2CH2−COOH+HCOOHMnO Heat
answer is A.
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Detailed Solution
In option (2), aldehyde is not formed. When a terminal alkyne is oxidised with KMnO4, a carboxylic acid is always formed. All options are preparation of aldehydes.