Question

The steam volatile compounds among the following are:

Choose the correct answer from the options given below:
 

• A. \( {(A)} \) and \( {(B)} \) Only
• B. \( {(A)}, {(B)} \) and \( {(C)} \) Only
• C. \( {(B)} \) and \( {(D)} \) Only
• D. \( {(A)} \) and \( {(C)} \) Only

Hint:

Steam volatility depends on the molecular size and the ability to form hydrogen bonds. Lower molecular weight compounds with hydrogen bonding groups like hydroxyl or amine are typically more steam volatile.

Answer 1

The Correct Option is A

Steam volatile compounds are those easily vaporized at low temperatures, generally possessing hydrogen bonding capabilities or low molecular weight. Considering the options presented:

- (A) \( {C}_6{H}_4{OH}{NO}_2 \): This nitrophenol is steam volatile due to its phenolic group enabling hydrogen bonding and its low molecular weight.

- (B) \( {C}_6{H}_4{NH}_2{NO}_2 \): This nitroaniline is also steam volatile due to its amine group, which facilitates hydrogen bonding.

- (C) \( {C}_6{H}_4{OH}{NH}_2 \): This amphenol, despite containing amine and phenolic groups, has a higher molecular weight, making it less likely to be steam volatile.

- (D) \( {C}_6{H}_5{OH} \): Phenol is steam volatile; however, it is not the optimal match among the provided steam volatile candidates. Therefore, the correct selection is (1).