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Distinguishing Test of Terminal and Non Terminal Alkynes

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Question

Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(increases, decreases, positive, efficient, 68, non-efficient, no $α$ -hydrogen, $α$ -hydrogen, negative, Rosenmund's, greater, Cannizzaro, 74, common-ion effect, lesser, buffer action, diamagnetic, paramagnetic)
Benzaldehyde undergoes in reaction on treatment with concentrated sodium hydroxide because it has atom.

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Solution

Benzaldehyde undergoes Cannizzaro in reaction on treatment with concentrated sodium hydroxide because it has no α -hydrogen atom. One molecule of benzoic acid is oxidised to benzoate ion and other molecule is reduced to benzyl alcohol.
$2 P h - C H O K O H - -- \to P h C O O^{-} + P h C H_{2} - O H$

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Distinguishing Test of Terminal and Non Terminal Alkynes

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