Over 110 Short Q&A for Chemical and Ionic Equilibrium (Class 11 NCERT) Part 1: Chemical Equilibrium (General Concepts) Q. No. Question Answer 1 Define a Reversible Reaction. A reaction that can proceed in both forward and reverse directions. 2 What is a State of Chemical Equilibrium? The state where the rate of the forward reaction equals the rate of the reverse reaction. 3 Is chemical equilibrium static or dynamic? Dynamic (reactions continue, but concentrations remain constant). 4 How is the Equilibrium Constant (K) expressed in terms of concentration? Kc​ (Concentration in mol L−1). 5 How is the Equilibrium Constant (K) expressed in terms of partial pressure? Kp​ (Pressure in bar or atm). 6 Write the relationship between Kp​ and Kc​. Kp​=Kc​(RT)Δng​. 7 What does Δng​ represent in the Kp​ and Kc​ relationship? (Moles of gaseous products) - (Moles of gaseous reactants). 8 When is Kp​=Kc​? When Δng​=0. 9 Does the magnitude of K indicate the speed of a reaction? No, K indicates ...

  Le  Cha telier's  principle states that  if a  dynamic equilibrium  is disturbed by changing the conditions, the position of equilibrium shifts to counteract the change to reestablish equilibrium. If  a chemical reaction is at equilibrium and experiences a change in pressure, temperature, or concentration of products or reactants, the equilibrium shifts in the opposite direction to offset the change. 1. Effect of change in concentration If the concentration of a substance is changed, the equilibrium will  shift  to minimize the effect of that change. when the concentration of one of the substances in, a system at equilibrium is increased, then the equilibrium will shift so as to use up the substance added. Suppose at equilibrium one of the reactants is added, the equilibrium will shift in the direction that consumes reactants, i.e., the forward direction. The more of the reactants would be converted into products. On the other hand, if one...