State and explain the law of mass action. Apply it to the following equilibria:
(i) `H_(2(g)) + F_(2(g)) hArr 2HF_(g)`
`(ii) NH_(4)HS_(S) hArr NH_(3(g)) + H_(2)S_(g)`
(iii) `PCl_(5(s)) hArr PCl_(3(l)) + Cl_(2(g))`

What will be the effect of increase in pressure on the following equilibria : (i) N_(2) O_(4) (g) hArr 2NO_(2) (g) (ii) PCI_(5) (g) hArr PCI_(3) (g) +CI_(2) (g) (iii) N_(2) (g) + 3H_(2) (g) hArr 2NH_(3) (g) (iv) H_(2) (g) + I_(2) (g) hArr 2HI (g)

Give the mathematical expression for the equlibrium constant (K_(c) " and " K_(p)) for the ractions (i) H_(2)(g) + I_(2)(g) hArr2HI(g) (ii) N_(2)(g) +3H_(2)(g) hArr 2NH_(3)(g) (iii) PCl_(5)(g) hArr PCl_(3)(g)+Cl_(2)(g)

Write the relation between k_p and K_c for the following reactions. (i) N_2(g) +3H_2(g) hArr 2NH_3(g) (ii) 2H_2O(g) hArr 2H_2(g) +O_2(g)

What will be the effect of increased pressure on the following equilibria : (i) N_2(g) + 3H_2(g) hArr 2NH_3(g) (b) N_2O_4(g) hArr 2NO_2(g) (iii) 2SO_2(g) + O_2(g) hArr 2SO_3(g) (iv) H_2(g) +I_2(g) hArr 2HI(g)

Write the equilibrium constant expressions for the following reactions : (i) 1/2N_2(g)+3/2H_2(g) hArr NH_3(g) (ii) 2H_2O(g) hArr 2H_2(g)+O_2(g)