Test: Le Chatelier's Principle - JEE MCQ
10 Questions MCQ Test - Test: Le Chatelier's Principle
In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?
is a noble gas, it is also unreactive but it decreases the activation energy in both forward as well as backward directions by the same amount of reversible reaction.
No. of moles for forward reaction 
for reactant and 2 for product
No. of moles for backward reaction 
for reactant and 2 for product
No. of moles for forward reaction 
for reactant and 1 for product
No. of moles for backward reaction 
for reactant and 2 for product
No. of moles for forward reaction 
for reactant and 2 for product
No. of moles for backward reaction 
for reactant and 4 for productFor the formation of 
from its constituent elements, the favourable conditions for its formation are
from its constituent elements, the favourable conditions for its formation are
takes place according to Le-Chatelier's principle.
is a gas, so decrease in temperature will favour forward direction.
.
For a reaction A(s) ⇌ B(s) + C(g) the set of all correct statements are
a) K is independent of [A].
b) K is dependent on partial pressure of C at a given temperature.
c) ΔH will be independent of temperature.
d) ΔH is independent of the catalyst addition.
a) K is independent of [A].
b) K is dependent on partial pressure of C at a given temperature.
c) ΔH will be independent of temperature.
d) ΔH is independent of the catalyst addition.
concentration of solid is considered as one during heterogenous equilibrium. So, as we can see 
is independent of 
.
So, 
is dependent on partial pressure of 
.The % yield of ammonia as a function of time in the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), ΔH < 0 at (P, T1) is given below
If this reaction is conducted at (P, T2), with T2 > T1, the %yield of ammonia as a function of time is represented by
yield will also increase with time. But at equilibrium 
yield at high temperature 
would be less than at 
as reaction is exothermic so the graph is
Some inert gas is added at constant volume to the following reaction at equilibrium NH4HS(s) ⇌ NH3(g) + H2S(g)
Predict the effect of adding the inert gas:
The standard state Gibb's free energy change for the isomerisation reaction cis-2-pentene ⇌ trans-2-pentene is −3.67 kJ mol−1 at 400 K. If more trans-2-pentene is added to the reaction vessel
The equilibrium concentrations of 
and 
in the formation of 
at 
are 
and 
respectively. The equilibrium constant 
at the same temperature is
The reaction, SO2 + Cl2 ⟶ SO2Cl2 is exothermic and reversible. A mixture of 
, 
(g) and 
is at equilibrium in a closed container. Now a certain quantity of extra 
is introduced into the container, the volume remaining the same. Which of the following is are true?
equilibrium will shift to RHS which is exothermic. Hence temperature will increase.Why only 
gets precipitated as 
and not 
as 
when 
is passed through an acidic solution containing 
and 
?
of 
is less than 
. In acidic medium ionisation of 
is suppresed (common ion effect) and 
of 
does not exceed.Hemoglobin 
protein transport 
in blood and each 
can bind 
, molecules. In discussing protein oxygen binding capacity, biochemists use a measure called the 
value, defined as the partial pressure of oxygen at which 
of hemoglobin is saturated. Fetal hemoglobin has a 
value of 
torr and adult has 
value of 
torr. For the following equilibrium:
What is the value of 
[Where K represents equilibrium constant.]
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