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Q.

The pH of 0.1 M solutions of the following compounds starts to rise in the following way:

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a

NaCl<NH4Cl<NaCN<HCl

b

NaCN<NH4Cl<NaCl<HCl

c

HCl< NH4Cl<NaCl<NaCN

d

HCl<NaCl<NaCN<NH4Cl

answer is D.

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Detailed Solution

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pH is the measure of whether the solution is acidic, basic or neutral on the basis of its value.

pH of acid is lowest and pH of the base is the highest.

HCl is acid. NH4Cl is an acidic salt.

NaCl is neutral salt, NaCN is basic salt.

 

The correct order of pH is-

Acid< Acidic Salt< Neutral Salt< Basic Salt < Base

 

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