Aldehydes and Ketones - Result Question 44

####54. Match the compounds/ions in Column I with their properties/reactions in Column II.

$(2007,6 M)$

Column I Column II
A. $C _6 H _5 CHO$ p. gives precipitate with
2, 4-dinitrophenylhydrazine
B. $CH _3 C \equiv CH$ q. gives precipitate with $AgNO _3$
C. $CN^{-}$ r. is a nucleophile
D. $I^{-}$ s. is involved in cyanohydrin
formation

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Answer:

Correct Answer: 54. $A \rightarrow p, q, s \quad B \rightarrow q, r \quad C \rightarrow q, r, s \quad D \rightarrow q, r$.

Solution:

Column I Column II
A. $\quad C _6 H _5 CHO$ Gives phenyl hydrazone with 2,
4-dinitrophenyl hydrazine.
Gives precipitate with $AgNO _3$, Tollen’s
test forms cyanohydrin.
B. $\quad CH _3-C \equiv CH$ Gives precipitate $\left(CH _3-C \equiv CAg\right)$
with $AgNO _3$.
A nucleophile, undergo electrophilic attack.
C. $\quad CN^{-}$ Forms AgCN with $AgNO _3$.
A nucleophile is involved in cyanohydrin
formation.
D. $\quad I^{-}$ Gives AgI precipitate with $AgNO _3$ and it is
a nucleophile.


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