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Chemical Equilibria
Complete the following statements by selecting the correct alternative from the choices given:
The salt which will not hydrolyse in aqueous solution is:
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Copper sulphate
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Sodium sulphate
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Potassium cyanide
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Sodium carbonate
B.
Sodium sulphate
Complete the following statements by selecting the correct alternative from the choices given:
For the reaction 2S02 + 02 ---> 2S03 the unit of equilibrium constant is
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L mol-1
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J mol-1
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mol L-1
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[Lmol-1]2
A.
L mol-1
Two moles of NH3 are introduced into the one-litre flask in which it dissociates at high temperature as follows : 2NH3 (g) --> N2 (g) + 3H2 (g) Determine Kc, it at equilibrium 1 mole of NH3 remains.
(i) Calculate the degree of hydrolysis of 0.2(M) sodium acetate solution.
(Hydrolysis constant of sodium acetate = 5.6x 10 -10 and ionic product of H20 = 10 -14 at 25°C )
(ii) Explain why high pressure is used in the manufacture of ammonia by Haber’s process. State the law or principle used.
i) we have given,
Hydrolysis constant of sodium acetate (Ka) =5.6 x 10-10
Kw =10-14
Degree of hydrolysis calculated as,
ii) Formation of ammonia takes place with a decrease in volume. Hence the reaction is favoured with high pressure. Le Chatelier’s Principle – when a system at equilibrium is subjected to a stress, the equilibrium shifts in that direction to nullify the effect of the stress.
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Mock Test Series
Mock Test Series