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NTA Abhyas 2020
Exam
NTA Abhyas
Year
2020
Subject
Chemistry
Chapter
Practical Chemistry

NTA Abhyas 2020 · Chemistry · Practical Chemistry

Which salt on heating with conc. H _ 2 S O _ 4 gives violet vapours?

Which salt on heating with conc. H2SO4{H}_{2}S{O}_{4} gives violet vapours?

Options

  1. AIodide
  2. BNitrate
  3. CSulphate
  4. DBromide

Correct answer

A. Iodide

Step-by-step solution

KI+H2SO4Conc.→ΔKHSO4+HIKI + \mathop{{H}_{2}S{O}_{4}}_{Conc.}\overset{\Delta}{→}KHS{O}_{4} + HI

\text{conc}\text{.}{H}_{2} {\text{SO}_{4} \text{+ 2HI} \to \mathop{{\text{2H}_{2} {\text{O + I}_{2} {\text{+ SO}_{2}}_{\text{Violet}\text{vapours}}
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