Question

Observe the following reaction \[ \mathrm{PH_3(g)} \xrightarrow{\text{Light}} X+\mathrm{H_2} \] \[ \mathrm{PH_3(g)} \xrightarrow{300^\circ\mathrm{C}} X+\mathrm{H_2} \] Which of the following is NOT correct regarding \(X\)?

• A. It is non-poisonous, odourless solid
• B. It is insoluble in water and carbon disulphide
• C. It has polymeric structure
• D. It exhibits chemiluminescence in dark \bigskip

Hint:

White phosphorus:

• Glows in the dark (chemiluminescence).
• Poisonous.
• Soluble in carbon disulphide.

Red phosphorus:

• Non-poisonous.
• Polymeric.
• Does not glow in the dark.
• Insoluble in carbon disulphide.

Answer 1

The Correct Option is D

Step 1: PH₃ decomposes to red phosphorus (X). Red P: non-poisonous, insoluble in water/CS₂, polymeric. Chemiluminescence is property of white P, not red P.

Step 2: Write the final answer. \(\boxed{\text{It exhibits chemiluminescence in dark}.}\)