Question

In which of the following equilibrium `K_c` and `K_p` are not equal ?
A. `2NO(g)hArrN_2(g)+O_2(g)`
B. `SO_2(g)+NO_2(g)hArrSO_3(g)+NO(g)`
C. `H_2(g) +I_2(g)hArr2HI(g)`
D. `2C(s)+O_2(g)hArr2CO_2(g)`

Answer 1

Correct Answer - D
Key idea The reaction for which the number of moles of gasesous products `(n_p)` is not equal to the number of moles of gaseous reactants `(n_R)` has different value of `K_c` and ` K_p`.
From the equation `K_p=K_Cxx(RT)^(Deltan_g)`
where , `[Deltan_g" gaseous"=n_p-n_R]`
(a) `n_P=n_R=2, "thus", K_P=K_C`
(b) `n_P=n_R=2, "thus", K_P=K_C`
(c) `n_P=n_R=2, "thus", K_P=K_C`
(d) `n_P=2,n_R=1, "thus", K_PneK_C`