Le-chatelier's Principle

Author:Tamil Nadu Board
11th Tamil Nadu Board
IMPORTANT

Important Questions on Le-chatelier's Principle

HARD
IMPORTANT

Consider the following reaction, S(s) + 3F2(g)  SF6(g).

In the above reaction, find out whether you have to increase (or) decrease the volume to increase the yield of the product.

HARD
IMPORTANT

Consider the following reaction, CaCO3(s)  CaO(s) + CO2(g).

In the above reaction, find out whether you have to increase (or) decrease the volume to increase the yield of the product.

HARD
IMPORTANT

Consider the following reactions, H2(g) + I2(g)  2HI.

In the above reaction, find out whether you have to increase (or) decrease the volume to increase the yield of the product.

HARD
IMPORTANT

The partial pressure of carbon dioxide in the reaction CaCO3(s)  CaO(s) + CO2(g) is 1.017 × 103 atm at 500 °C. Calculate Kp at 600 °C for the reaction. ΔH° for the reaction is 181 kJ mol1 and does not change in the given range of temperature.

HARD
IMPORTANT

The equilibrium constant KP for the reaction N2(g) + 3H2(g)  2NH3(g) is 8.19×102 at 298 K and 4.6×101 at 498 K. Calculate ΔH° for the reaction.

HARD
IMPORTANT

What is the effect of added inert gas on the reaction at equilibrium?

HARD
IMPORTANT

For the reaction, A2(g) + B2(g)  2AB(g) ; ΔH is ve. The following molecular scenes represent different reaction mixture (A – green, B – blue)

Question Image

What is the effect of increase in pressure for the mixture at equilibrium?

HARD
IMPORTANT

[Co(H2O)6 ]2+ (aq) (pink) + 4Cl (aq)  [CoCl4 ]2 (aq) (blue)+ 6H2O (l)
In the above reaction at equilibrium, the reaction mixture is blue in colour at room temperature. On cooling this mixture, it becomes pink in colour. On the basis of this information, which one of the following is true?

HARD
IMPORTANT

Solubility of carbon dioxide gas in cold water can be increased by

HARD
IMPORTANT

The formation of ammonia from N2(g) and H2(g) is a reversible reaction, N2(g) + 3H2(g)  2NH3(g) + Heat.

What is the effect of increase of temperature on this equilibrium reaction?