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Question

Match the reaction in List-1 based on precipitate obtained as one of the products in List-2.

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Solution

(A) Mercuric ions reacts with iodide ions to form red ppt of mercuric iodide.
Hg2+(aq)+I(aq)HgI2(Red ppt.)
(B) Cupric ions reacts with ferrocyanide ion to form brown ppt of cupric ferrocyanide.
2Cu2+(aq)+[Fe(CN)6]4(aq)Cu2[Fe(CN)6](Brown ppt.)
(C) Magnesium ions react with hydrogen phosphate ions in presence of ammonia to form white ppt of magnesium ammonium phosphate.
Mg2+(aq)+NH3(aq)+HPO24(aq)MgNH4PO4(White)
(D) Lead (II) ions reacts with chromate ions to form yellow ppt of lead chromate.
Pb2+(aq)+CrO24(aq)PbCrO4(Yellow)

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