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Introduction to Alkenes

Select the re...

Question

Select the reaction(s) in which $- C = O$ group changes to $- C H_{2}$ .
A) Clemmensen reduction
B) Wolff-Kishner reduction
C) Aldol condensation
D) Rosenmund reduction

A

A and B only

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B

B and C only

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C

A and D only

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D

All A, B, C and D

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Solution

The correct option is C A and B only
During Clemmensen reduction and Wolff Kishner reduction, aldehyde and ketone groups $(- C = O)$ are converted to $- C H_{2}$ .

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Q. Match the column I with column II and mark the appropriate choice.

Column I	Column II
(A) Clemmensen reduction	(i) $N H_{2} N H_{2}, K O H / △$
(B) Wolff-kishner	(ii) $Z n - H g + c o n c . H C l$
(C) Iodoform reaction	(iii) $H_{2}, P d / P t / N i$
(D) Catalytic hydrogenation	(iv) $N a O H + I_{2}$

A) Grignard reagent	1) $H_{2} / P d - B a S O_{4}$
B) Clemmensen reduction	2) $N_{2} H_{4} / K O H / C H_{2} O H - C H_{2} O H$
C) Rosenmunds reduction	3) $C H_{3} M g X$
D) Wolf-Kishner reduction	4) $Z n - H g / C o n c . H C l$ 5) $H_{2} / N i$

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