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Chemical Equilibrium MCQ - Multiple Choice Question and Answer

Chemical Equilibrium MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
Once the equilibrium is reached under given condition:

Cone, remains the same in spite of the change in temperature
Cone, of all the substances presents do not change
Cone, of reactants remairfs same
Cone, of products remains same

Question No : 2
For the reaction H2+I22HI the equilibrium constant (K) is

HI2H22I2
HIH2I2
H2I2H+I2
HI2H2I2

Question No : 3
PCL5is kept in a closed container at a temperature of 250 K the equilibrium concentration of the different substances is PCL5=0.045 moles liter-1 PCL3=CL2=0.096 moles liter-1 The value of equilibrium constant for the reaction PCL5PCL3+CL2 will be

50
50.4
0.0205
0.205

Question No : 4
Equilibria are those in which the reactants and products are present in more than phases:

Physical
Heterogeneous
Chemical
Homogeneous

Question No : 5
Equilibrium constant changes with

time
temperature
pressure
both temperature and concentration

Question No : 6
The equilibrium constant KH2SgH2g+12S2g at 1400 K is 23.90. The equilibrium constant for the reaction 2H2S2H2g+S2g at 1400 K will be

571.20
47.80
371.20
59.543

Question No : 7
Equilibrium constant for the reaction PCL5PCL3+CL2 is 0.0205 at 230°C and 1 atmospheric pressure if at equilibrium concentration of PCL5is 0.235 moles liter-1and that of CL2= 0.028 moleslit-1 then conc. of PCL3 at equilibrium is

0.0174
0.174
0.0348
1.74