The oxidation of `SO_(2)` by `O_(2)` to `SO_(3)` is an exothermic process. The yield of `SO_(3)` is maximum if
i. Temperature is increased and pressure is kept constant
ii. Temperature is reduced and pressure is kept constant
iii. Pressure is increased
iv. Temperature and pressure both are increased
The correct option is:

Options

A. I, ii
B. i, iii
C. ii, iii
D. ii, iii, ive

Answer

C

Explanation

`2SO_(2)(g)+O_(2)(g)rarr 2SO_(3)(g), DeltaH=-ve`
and `Deltan=n_(P)-n_(R)=2-3=-1`
Therefore, `SO_(3)` will be more at low `T` and high `P`.