Hydrocarbons - Result Question 61

Passage

Schemes $1$ and $2$ describe sequential transformation of alkynes M and N. Consider only the major products formed in each step for both schemes.

46. The correct statement with respect to product $Y$ is

(a) it gives a positive Tollen’s test and is a functional isomer of $X$

(b) it gives a positive Tollen’s test and is a geometrical isomer of $X$

(c) it gives a positive iodoform test and is a functional isomer of $X$

(d) it gives a positive iodoform test and is a geometrical isomer of $X$

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Answer:

Correct Answer: 46. (c)

Solution:

  1. PLAN: This problem can be solved by using the concept of iodoform test and functional isomerism.

Iodoform test The compound containing $-COCH _3$ or $-CH(OH)$ group will undergo iodoform test

  • Thus, $X$ and $Y$ are functional isomers of each other and $Y$ gives iodoform test due to the presence of $CH _3 CO$ group as Indicated. Hence, correct choice is (c).