JEE Main Chemistry question

ChemistryThe p-Block ElementsJEE Main

A metal 'M' reacts with to give a compound 'A' (). 'A' on heating at high temperature gives back 'M' and 'A' on reacting with gives a gas B. 'B' turns solution blue on passing through it. M and B can be [UP SEE 2008]

Answer: (B)

Solution

The nitride formula shows M is monovalent, so M must be an alkali metal, ruling out (A) and (D) (Al and Mg are trivalent/divalent). Among alkali metals, only lithium reacts directly with to form a nitride: (A). reacts with

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Question ID VK-137555