Question

A black coloured compound X turns to brown metal Y when reacts with hydrogen gas. Y
cannot liberate H2 gas with dil. HCl.
i) Identify X and Y and write the chemical equation for that reaction.
ii) Mention the type of reaction which has taken place.
iii) When Y is added to two test tubes containing ZnSO4 solution in one test tube and
AgNO3 solution in another test tube, in which test tube reaction takes place. Write
the chemical equation for that reaction.

Answer 1

Answer:

the black colour compound x is copper