Q.1
A 1M solution of glucose reaches dissociation equilibrium according to the equation given below:6HCHO ↔ C6H12O6What is the concentration of HCHO at equilibrium if equilibrium constant is 6×1022 ..[MP PMT 2000]
  • a) 1.6×10-8M
  • b)3.2×10-6M
  • c)3.2×10-4M
  • d)1.6×10-4M
Q.2
Kc for reactionN2(g) +O2(g) ↔ 2NO(g) at 300K is 4.0×10-Kp for above reaction will be (R=2 cal mol- K-1) ..[CBSE PMT 1994]
  • b) 4 ×10-6
  • a) 2.4 ×10-3
  • c) 4 ×10-6(RT)2
  • d) 16 × 10-12
Q.3
The reaction, SO2 + Cl2 → SO2Cl2 is exothermic and reversible. A mixture of SO2(g), Cl2(g) and SO2Cl2(l) is at equilibrium in a closed container. Now a certain quantity of extra SO2 is introduced into the container, the volume remaining the same. Which of the following is are true? [ ISM Dhanbad 1994]
  • a)The pressure inside the container will not change
  • b) The temperature will not change
  • c)The temperature will increase
  • d)The temperature will decrease
Q.4
On the basis of Le Chatellier principle, predict which of the following conditions would be unfavorable for the formation of SO3? Given that 2SO2 + O2 ↔ 2SO3 ; ΔH=-42 kcal .. [ MP PET 1998]
  • a) Low pressure
  • b) High pressure
  • c)high temperature
  • d)high concentration of SO2
Q.5
4 moles of A are mixed with 4 moles of B when 2 moles of C are formed at equilibrium according to the reactionA + B ↔ C + D The value of the equilibrium constant is ..[ CPMT 1992]
  • a) 4
  • b) 1
  • c)1/2
  • d)1/4
Q.6
The rate of forward reaction is two times that of the reverse reaction at a given temperature and identical concentration. K is
  • a) 0.5
  • b) 1.5
  • c) 2.5
  • d) 2
Q.7
Consider the reaction PCl5(g) ↔ PCl3(g) + Cl2(g) in a closed container at equilibrium. At a fixed temperature what will be the effect of adding more PCl5 on the equilibrium concentration of Cl2(g)? [ BHU 1991]
  • a)It decreases
  • b) It increases
  • c)It remains unaffected
  • d)It can not be predicted without the value of Kp
Q.8
Which of the following is not affected by pressure change? [ Pb CET 1999]
  • a) 2NO2(g) ↔ N2O4(g)
  • b) CO2(g) + H2O (l)↔ CO2 (solution)
  • c)H2(g) + I2(g) ↔ 2HI(g)
  • d)2O3(g) ↔ 3O2(g)
Q.9
An equilibrium mixture for the reaction2H2S (g) ↔ 2H2(g) + S2(g) had one mole of hydrogen sulphide, 0.2 mole of H2 and 0.8 mole of S2 in a two litre vessel. the value of K in mole/litre is [ IIT 1991]
  • a) 0.005
  • b) 0.016
  • c)0.08
  • d)0.160
Q.10
In the reaction PCl5(g) ↔ PCl3 + Cl2(g) the equilibrium concentration of PCl5 and PCl3 are 0.4 and 0.2 mole/litre respectively. If the value of K is 0.5, what is the concentration of Cl2 mole/litre [ EAMCET 2003]
  • a) 2.0
  • b) 1.5
  • c) 1.0
  • d) 0.5
Q.11
The KSP of Ag2CrOAgCl, AgBr and AgI are respectively 1.1×10-12, 1.8×10-10, 5.0 ×10-13, 8.3×10-17 Which of the following salts will precipitate last if AgNO3solution is added to the solution containing equal moles of NaCl, NaBr, NaI and Na2CrO4? [ AIPMT 2013]
  • a) AgI
  • b) AgCl
  • c) AgBr
  • d) Ag2CrO4
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