Question

Dissociation of phosphorus pentachloride is
favoured by -
(A) High temperature and high pressure
(B) High temperature and low pressure
(C) Low temperature and low pressure
(D) Low temperature and high pressure​

Answer 1

give the equation..........

Explanation:

pcl5----pcl3+cl2.........----it is surely aaa low pressure process.......by equation we can say about endothermic or exothermic

Answer 2

Answer: The correct answer is (B)- High temperature and low pressure.

Explanation: Phosphorous pentachloride divides into phosphorous trichloride and chlorine gas under high temperatures.

• PCl5 → PCl3 + Cl2 (under high temperature).

• Number of molecules in the products is more than reactants.
• The reaction will be a forward reaction and endothermic as it releases heat is absorbed in the process.

• High temperature helps to dissociate the reactant that is PCl5.

Hence, the final answer is high temperature and low pressure.

#SPJ2.