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Assertion : When H2S gas is passed into an aqueous solution of ZnCl2, Zn2+ ions are completely precipitated as zinc sulphide 

Reason : Zinc sulphide is insoluble in solutions of caustic alkali but dissolves in dilute HCl.

Hint : Ksp of ZnS is large and thus is completely precipitated only in presence of ammonium hydroxide. 

(A) Both Assertion and Reason are true and Reason is the correct explanation of Assertion. 

(B) Both Assertion and Reason are true but Reason is not correct explanation of Assertion 

(C) Assertion is true but Reason is false 

(D) Assertion is false but Reason is true

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(D) Assertion is false but Reason is true

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