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]
-
0%
a) 1.6×10-8M
-
62%
b)3.2×10-6M
-
12%
c)3.2×10-4M
-
25%
d)1.6×10-4M
Explanation
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]
-
43%
b) 4 ×10-6
-
43%
a) 2.4 ×10-3
-
14%
c) 4 ×10-6(RT)2
-
0%
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]
-
14%
a)The pressure inside the container will not change
-
29%
b) The temperature will not change
-
29%
c)The temperature will increase
-
29%
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]
-
0%
a) Low pressure
-
43%
b) High pressure
-
29%
c)high temperature
-
29%
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]
-
0%
a) 4
-
67%
b) 1
-
33%
c)1/2
-
0%
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
-
17%
a) 0.5
-
33%
b) 1.5
-
0%
c) 2.5
-
50%
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]
-
0%
a)It decreases
-
60%
b) It increases
-
20%
c)It remains unaffected
-
20%
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]
-
17%
a) 2NO2(g) ↔ N2O4(g)
-
17%
b) CO2(g) + H2O (l)↔ CO2 (solution)
-
33%
c)H2(g) + I2(g) ↔ 2HI(g)
-
33%
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]
-
17%
a) 0.005
-
67%
b) 0.016
-
17%
c)0.08
-
0%
d)0.160
Explanation
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]
-
17%
a) 2.0
-
50%
b) 1.5
-
33%
c) 1.0
-
0%
d) 0.5
Explanation
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]
-
14%
a) AgI
-
43%
b) AgCl
-
14%
c) AgBr
-
29%
d) Ag2CrO4
Explanation
