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What are the products of the following reactions?
CH3CH2X + KCN
CH3CH2X + AgCN
(CH3)3CX + KCN
(CH3)3CX + AgCN
C6H5X + KCN
C6H5X + AgCN
X=halogen
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With KCN the halogen will be replaced by CN
With AgCN the halogen will be replaced by NC ( isocyanide formation)
In case of benzene the halogen atom is difficult to be replaced under ordinary conditions, so no reaction with both KCN and AgCN