Chemical Equilibrium MCQ - 1 (Advanced) - JEE MCQ
15 Questions MCQ Test - Chemical Equilibrium MCQ - 1 (Advanced)
Which of the following statements is (are) correct ?
If is found that the equilibrium constant increases by factor of four when the temperature is increased from 25°C to 40°C. The value of ΔH° is
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The equilibrium constant for the following reactions at 1400 K are given.
2H2O(g)
2H2(g) + O2(g) ; K1=2.1×10-13
2CO2(g)
2CO(g)+O2(g);K2 = 1.4 × 10-12
Then, the equilibrium constant K for the reaction
H2(g) + CO2(g) 
CO(g) + H2O(g) is
2H2(g) + O2(g) ; K1=2.1×10-132CO(g)+O2(g);K2 = 1.4 × 10-12 CO(g) + H2O(g) is
Under what conditions of temperature and pressure, the formation of atomic hydrogen from molecular hydrogen will be favoured most ?
In the laboratory the equilibrium constant for a particular reaction can be measured at different temperatures. Plotting the data yields the graph shown. Which of the following statements is false?
(Note : The notation 4.40 e- 4 is equivalent to 4.40 × 10-4)
Statement-1 : Water boils at high temperature in pressure cooker.
Statement-2 : Increase in pressure leads to an increase in boiling point.
Statement-1 : A decrease in pressure leads to an increase in freezing point of water.
Statement-2 : For ice on melting volume decreases.
Statement-1 : The solubility of gases always increases with increase in pressure.
Statement-2 : High pressure favours the change where volume of gas decreases.
Statement-1 : Total number of moles in a closed system at new equilibrium is less than the old equilibrium if some amount of a substance is removed from a system.
A(g) 
B(g) equilibrium.
Statement-2 : The number of moles of the substance which is removed, is partially compensated as the system reached to new equilibrium.
Statement-1 : An exothermic reaction, non-spontaneous at high temperature, may become spontaneous at low temperature.
Statement-2 : Entropy of an exothermic reaction always decrease with decrease in temperature.
Statement-1 : Ammonia at a pressure of 10 atm and CO2 at a pressure of 20 atm are intoduced into an evacuated chamber. If Kp for the reaction.
NH2COONH4(s) 
2NH3(g) + CO2(g) is 2020 atm3, the total pressure after a long time is less than 30 atm.
Statement-2 : Equilibrium can be attained from both directions.
In a 7.0 L evacuated chamber, 0.50 mol H2 and 0.50 mol I2 react at 427°C
H2(g) + I2 (g) 
2HI(g). At the given temperature, Kc = 49 for the reaction.
What is the value of Kp ?
In a 7.0 L evacuated chamber, 0.50 mol H2 and 0.50 mol I2 react at 427°C
H2(g) + I2 (g) 2HI(g). At the given temperature, Kc = 49 for the reaction.
What is the total pressure (atm) in the chamber
In a 7.0 L evacuated chamber, 0.50 mol H2 and 0.50 mol I2 react at 427°C
H2(g) + I2 (g) 2HI(g). At the given temperature, Kc = 49 for the reaction.
How many moles of the iodine remain unreacted at equilibrium ?
In a 7.0 L evacuated chamber, 0.50 mol H2 and 0.50 mol I2 react at 427°C
H2(g) + I2 (g) 2HI(g). At the given temperature, Kc = 49 for the reaction.
What is the partial pressure (atm) of HI in the equilibrium mixture ?
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