Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Which of the following statements about phosphine and black phosphorus is correct?
A
Phosphine is prepared by reacting calcium phosphide with dilute HCl.
B
α-Black phosphorus is formed by heating white phosphorus at high pressure.
C
β-Black phosphorus does not burn in air at temperatures below 673 K.
D
Phosphine is a solid polymeric substance at room temperature.
Correct Answer
Option A
Detailed Explanation
Phosphine is indeed produced by the reaction of calcium phosphide with dilute HCl, as indicated in the NCERT context. α-Black phosphorus is formed from red phosphorus, while β-black phosphorus is made from white phosphorus at high pressure. Also, phosphine is a gas, not a solid polymer at room temperature.
Found an issue with this question?