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CGP EDU Academic Team
Published on: August 14, 2026
A white solid imparts a violet colour to a Bunsen flame. On being heated with concentrated H 2 SO 4 , the solid gives violet vapours that turn starch paper blue. The salt may be :
Text Solution
Verified by ExpertsThe correct answer is:
A
K → violet colour in flame test
2 I – + conc. H 2 SO 4 → H I + SO 4 2– ; H I + H 2 SO 4 → I 2 + H 2 O + SO 2
I 2 + starch → blue colour.
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