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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