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Q.

Statement – I: The addition of NH4OH to ZnSO4(aq) solution produces white precipitate, but no precipitate is formed in the presence of excess NH4Cl(S)
Statement – II: NH4Cl added, decreases the ionization of weak base NH4OH and the [OH] is not sufficient to cause the precipitation. 

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a

Statement – I is correct and Statement – II is incorrect

b

Both Statement – I and Statement – II are incorrect

c

Both Statement – I and Statement – II are correct, and II is correct explanation of I

d

Statement – I is incorrect and Statement – II is correct

answer is C.

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Common ion effect

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Statement – I: The addition of NH4OH to ZnSO4(aq) solution produces white precipitate, but no precipitate is formed in the presence of excess NH4Cl(S)Statement – II: NH4Cl added, decreases the ionization of weak base NH4OH and the [OH−] is not sufficient to cause the precipitation.