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Question

The reaction that proceeds in the forward direction is:

A
SnCl4+Hg2Cl2SnCl2+2HgCl2
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B
NH4Cl+NaOHH2O+NH3+NaCl
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C
Mn2++2H2O+Cl2MnO2+4H++2Cl
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D
S4O26+2I2S2O23+I2
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Solution

The correct option is B NH4Cl+NaOHH2O+NH3+NaCl
For a reaction to proceed in forward direction, it has to be spontaneous.
A spontaneous reaction is characterized by increase in entropy.

From the given reactions only option B shows an increase in entropy, because the number of molecules in the product is higher than that of the reactants.

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