Question

A vessel made of reddish brown metal W, developed a green colored solid X when left open in the air for a long time. When reacted with dilute H2SO4, the metal W forms a blue colored solution along with brisk effervescence of colorless and odourless gas Y. X decomposes to form a black colored oxide along with gas Z. Identify W, X, Y & Z.

Answer 1

Answer:

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