Question

A small amount of black powdery substances is taken in a test tube, when reacted with dil HCl it gives a blue solution
a. name the black powdery substances, and the compound which gives blue solution.
b. write chemical equation for the reaction between black powder and dil HCl.
subject: science
lesson: acids and bases

Answer 1

Answer:

here is ur require ans.....

Explanation:

a).Cuo ,copper oxide

and b).Cu0+2HCl gives CuCl2 + H20

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