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NEET levelSingle correct optionDifficulty 1 of 3qa130

Which solid, on warming with concentrated sulphuric acid, evolves violet vapours?

  1. A
  2. B
  3. C
  4. D

Answer: B

Iodide is oxidised by conc. to iodine, whose vapour is violet. Bromide gives reddish-brown , chloride gives colourless , and nitrate gives brown .
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