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The formation of cyanohydrin from ketone is an example of :
A. electrophilic addition
B. nucleophilic addition
C. nucleophilic substitution
D. none of these.

1 Answer

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Correct Answer - B
(i) `underset(" 1-Hexyne ")(CH_(3)(CH_(2))_(3)C-=CH)overset(H_(2)O,H_(2)SO_(4))underset(HgSO_(4))rarrunderset("2-Hexanone")(CH_(3)(CH_(2))_(3)-COCH_(3))`
(ii) `underset("3-Methyl-2-heptene")(CH_(3)(CH_(2))_(3)overset(CH_(3))overset("| ")"C "=CHCH_(3))overset((i)O_(3))underset((ii)H_(2)O)rarrunderset("2-Hexanone")(CH_(3)(CH_(2))_(3))-COCH_(3)+CH_(3)CO_(2)H`
(iii) `underset("2-hexanol")(CH_(3)(CH_(2))_(3)CHOHCH_(3))overset((i)CH_(3)CHO)underset((ii)H_(3)^(+)O)rarrunderset("2-Hexanol")(CH_(3)(CH_(2))_(3)CHOHCH_(3))overset(K_(2)Cr_(2)O_(7))underset(H_(2)SO_(4))rarrunderset("2 Hexanone")(CH_(3)(CH_(2))_(3)COCH_(3))`
(iv) `underset("1-Hexyne")(CH_(3)(CH_(2))_(3)C)-=CHoversetoverset("2 Hexanone")("Hydroboration")underset("Oxidation")rarrunderset("1-Hexanol")(CH_(3)(CH_(2))_(3)CH_(2)CHO)`

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