Write the relation between `K_(p) " and "K_(c)` for the following reactions :
`"(i)"" " PCI_(5) (g) hArr PCI_(3)(g) +CI_(2) (g)`
`"(ii)"" "N_(2)(g) +3H_(2)(g) hArr 2NH_(3)(g)`
`"(iii)"" "2H_(2)O(g) hArr 2H_(2)(g) +O_(2)(g)`
`"(iv)"" "H_(2)(g) + I_(2)(g) hArr 2HI(g)`