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Question

Violet vapors are given out when _________ is treated with conc.H2SO4.

A
bromide
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B
iodide
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C
chloride
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D
nitrate
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Solution

The correct option is B iodide
Violet vapours are given out when iodide is treated with conc. H2SO4.
NaI+H2SO4HI+NaHSO4
H2SO4+2HII2 (violet vapours) +SO2+2H2O

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