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JEE Main Chemistry question

ChemistryPrinciples Related to Practical ChemistryJEE Main

A metal gives two chlorides 'A' and 'B'. 'A' gives a black precipitate with and 'B' gives a white one. With KI, 'B' gives a red precipitate soluble in excess of KI. 'A' and 'B' are respectively:

Answer: (B)

Solution

disproportionates with to a black mixture of Hg and , while gives white infusible ; also gives red with

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Question ID VK-147862