Which of the following substances will leave a black residue on strong heating ? — Qualitative and Quantitative Analysis Chemistry Question
Question
Which of the following substances will leave a black residue on strong heating ?
Answer: A,D
💡 Solution & Explanation
CuSO4.5H2O on strong heating leaves black CuO. MnSO4 on strong heating leaves Mn3O4 (dark brown/black). ZnCO3 gives ZnO (yellow hot, white cold) and PbCO3 gives PbO (yellow).
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