Q. On the basis of Le-Chatlier's principle, what would be the effect on Ke for following equilibrium:
$PC{l}_5\left(g\right) \leftrightarrow PC{l}_3 \left(g\right) +C{l}_2\left(g\right) ∆H = 124 kJ Kc = 8.3 \times {10}^{-3}$
If  (a) temperature is increased
     (b) pressure is increased
     (c) Write the expression for equilibrium constant and calculate Kc for reverse reaction.