Assertion : A reaction `2SO _(2) + O _(2) hArr 2SO _(3),,`has `K _(p)` at 298 K and 500 K as `4.0 xx 10 ^(34) and 8.5 xx 10 ^(10)` respectively.
Reason : The `E_(a)` for the forward reaction is lesser than `E_(b)` for the backward reaction.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but(R) is not the correct explanation of (A)
C. If(A) is correct, but (R) is incorrect
D. If both (A) and (R) are incorrect

Answer

A

Explanation

`K_( P)`decreases with temperature and thus, `Delta H - ve. ` Also `Delta H E _(a) (f ) - E _(a) b.` The negative value of `Delta H` is possible only when `E _(a) (b) gt E _(a) B _(a) (f).`