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Amanat Grade: 12th pass
        
The increasing order of the rate of HCN addition to compound A – D is
a. HCHO
b. CH base 3COCH base 3
c. phCOCH base 3
d. phCOPh
(a) D < C < B < A
b. C < D < b < A
c. A < B < C < D
d/ D < B < C < A
3 years ago

Answers : (1)

Kevin Nash
askIITians Faculty
332 Points
										

(a) NOTE : Addition of HCN to carbonyl compounds is nucleophilic addition reaction. The order of reactivity of carbonyl compounds is

Aldehydes (smaller to higher) Ketones (smaller to higher), Then

HCHO > CH base 3COCH base 3 > Ph.COCH base 3 > PhCOPh

NOTE : The lower reactivity of Ketones is due to presence of two alkyl group which shows +1 effect. The reactivity oof Ketones decreases as the size of alkyl group increases.

3 years ago
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