Give a chemical test to distinguish between the Manganese dioxide and copper (II) oxide.

Question 1

Question 2

Test : (i) Add cone. HCl to the sol. and heat,

(ii) Filter the sol. after reaction.

Manganese dioxide (**) : Greenish ***** gas is evolved MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 Filterate is brownish in colour.

Copper (II) oxide : There is no evolution of chlorine gas. CuO → 2HCl + CuCl2 + H2O Filterate is blueish colour

kratos · Answer 1 · 2021-04-02T16:28:28+0000

Test : (i) Add cone. HCl to the sol. and heat,

(ii) Filter the sol. after reaction.

Manganese dioxide (**) : Greenish ***** gas is evolved MnO2 + 4HCl → MnCl2 + 2H2O + Cl2 Filterate is brownish in colour.

Copper (II) oxide : There is no evolution of chlorine gas. CuO → 2HCl + CuCl2 + H2O Filterate is blueish colour

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