Which are heterogenous equilibrium ?
state the unit of `K_c`.
(i)`H_2O_((l)) hArr H_2O_((g))`
(ii)`Ca(OH)_(2(s)) + aq hArr Ca_((aq))^(2+) + 2OH_((aq))^(-)`
(iii)`CaCO_(3(s)) hArr CaO_((s)) + CO_(2(g))`
(iv)`CH_3COOC_2H_(5(l)) + H_2O_((l)) hArr CH_3COOH_((l)) + C_2H_5OH_((l))`
(v)`Fe_((aq))^(3+) + SCN_((aq))^(-) hArr [Fe(SCN)]_((aq))^(2+)`

Explanation

(i)`K_c=[H_2O]="mol L"^(-1)`
(ii)`K_c=[Ca^(2+)][OH^-]^2 ("mol L"^(-1))^3`
(iii) `K_c=[CO_2] "mol L"^(-1)`
(iv)`K_c=([(CH_3COOH)][(C_2H_5OH)])/([CH_3COOC_2H_5][H_2O])` no unit
(v)`K_c=([Fe(SCN)^(2+)])/([Fe^(3+)][SCN^(2+)])`
Thus unit of `K_c` is `("mol" L^(-1))^(-1)` or L `mol^(-1)`