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NCERT Textbook: Equilibrium | Chemistry Class 11 - NEET PDF Download

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FAQs on NCERT Textbook: Equilibrium - Chemistry Class 11 - NEET

1. What is equilibrium?
Ans. Equilibrium refers to a state in which the forward and backward reactions occur at equal rates, resulting in no net change in the concentration of reactants and products. It is a dynamic state where the concentrations of reactants and products remain constant over time.
2. How is equilibrium established in a chemical reaction?
Ans. Equilibrium in a chemical reaction is established when the rate of the forward reaction becomes equal to the rate of the backward reaction. This can be achieved by altering the temperature, pressure, or concentration of reactants and products. At equilibrium, the concentrations of reactants and products reach a constant value.
3. What is the significance of the equilibrium constant (K) in a chemical reaction?
Ans. The equilibrium constant (K) is a measure of the extent to which a reaction proceeds at equilibrium. It is calculated by taking the ratio of the concentrations of products to reactants, with each concentration raised to the power of its coefficient in the balanced chemical equation. The value of K indicates whether the reaction favors the formation of products (K > 1) or reactants (K < 1).
4. How does Le Chatelier's principle help predict the effect of changes on an equilibrium system?
Ans. Le Chatelier's principle states that when a system at equilibrium is subjected to a change in temperature, pressure, or concentration, it will shift in a way that minimizes the effect of the change. For example, if the concentration of a reactant is increased, the equilibrium will shift towards the product side to consume the excess reactant and restore equilibrium.
5. Can equilibrium be influenced by a catalyst?
Ans. No, a catalyst does not influence the position of equilibrium but only speeds up the forward and backward reactions by providing an alternative reaction pathway with lower activation energy. The presence of a catalyst increases the rate at which equilibrium is reached but does not affect the concentrations of reactants and products at equilibrium.
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