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Question

In which of the following equilibrium, change in the volume of the system does not alter the number of moles?

A
N2(g)+O2(g)2NO(g)
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B
PCl5(g)PCl3(g)+Cl2(g)
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C
N2(g)+3H2(g)2NH3(g)
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D
SO2Cl2(g)SO2(g)+Cl2(g)
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Solution

The correct option is A N2(g)+O2(g)2NO(g)
In the equilibrium N2(g)+O2(g)2NO(g), change in the volume of the system does not alter the number of moles.
Volume change is accompanied with pressure change. A reaction in which the total number of moles of gaseous reactants is equal to the total number of moles of gaseous products, the change in pressure will not affect the position of the equilibrium.

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