Question

Which one of the following conditions will favour maximum formation of the product in the reaction,
$A_2\left(g\right)+B_2\left(g\right)\rightleftharpoons X_2\left(g\right);{\Delta }_{r}H=-XkJ$ ?

• A. High temperature and low pressure
• B. Low temperature and high pressure
• C. High temperature and high pressure
• D. Low temperature and low pressure

Answer 1

The correct option is B Low temperature and high pressure

$A_2\left(g\right)+B_2\left(g\right)\rightleftharpoons X2\left(g\right);{\Delta }_{r}H=-XkJ$
On increasing pressure equilibrium shifts in a direction where pressure decreases i.e. forward direction.

On decreasing temperature, equilibrium shifts in exothermic direction i.e., forward direction.

So, high pressure and low temperature favours maximum formation of product.