Which of the following salt on heating with concentrated H2SO4, coloured vapours do not evolve ? — Qualitative and Quantitative Analysis Chemistry Question
Question
Which of the following salt on heating with concentrated H2SO4, coloured vapours do not evolve ?
Answer: C
💡 Solution & Explanation
NaBr + H2SO4 -> Na2SO4 + HBr -> Br2↑ (Reddish brown). NaNO3 + H2SO4 -> NO2↑ (Reddish brown). CaF2 + H2SO4 -> CaSO4 + HF↑ (Colourless). KI + H2SO4 -> K2SO4 + 2HI -> I2↑ (Violet).
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