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Question

Le-Chatelier principle is not applicable to

A

H2(g)+I2(g)2HI(g)
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B

Fe(s)+S(s)FeS(s)
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C
N2(g)+3H2(g)2NH3(g)
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D
N2(g)+O2(g)2NO(g)
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Solution

The correct option is B
Fe(s)+S(s)FeS(s)

Le- Chatelier principle is applicable only to gases. But it is not necessary that in a certain chemical reaction, all the reactants species must be in gaseous phase.
Fe(s)+S(s)FeS(s) is in solid-solid equilibrium phase hence, Le-chatelier principle is not applicable this.

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