In the equilibrium 2P(g) Q(g) + R(g) , adding Q at constant volume will shift the equilibrium in which direction?
According to Le Chatelier’s principle, adding Q increases its concentration, shifting the equilibrium left to reduce Q by forming more P .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Relationship Between Kp Kc and Factors Affecting Equilibrium - Le Chatelier