Chemistry
A black coloured solid which on reaction with dilute sulphuric acid forms a blue coloured solution is :
- Carbon
- Manganese [IV] oxide
- Lead [II] oxide
- Copper [II] oxide
Acids Bases Salts
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Answer
Copper [II] oxide
Reason — Copper [II] oxide is black in colour and the following reaction takes place when it is treated with dilute sulphuric acid —
CuO + H2SO4 ⟶ CuSO4 + H2O
CuSO4 is a blue coloured solution.
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