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(a) Write the reagent used in the follow...

(a) Write the reagent used in the following :
`C_(6)H_(5)COCH_(3)overset(?)rarr C_(6)H_(5)CH_(12)CH_(3)`
(b) Arrange the following compounds in increasing order of reactivity towards nucleophilic addition.
`CH_(3)CHO, C_(6)H_(5)CHO, HCHO`

A

Igt III gtII

B

III gt II gt I

C

I =II gt III

D

I gt II gt III

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