Question

A white solid imparts a violet color to a bunsen flame. On being heated with conc. $H_{2}S{O}_4$, the solid gives violet vapors that turn starch paper blue. The salt may be :

• A. $KI$
• B. $NaI$
• C. $Mg{I}_2$
• D. $CaB{r}_2$

Answer 1

Answer: (A)

$KI$

A white solid imparts a violet color to a Bunsen flame. On being heated with concentrated $H_{2}S{O}_4$, the solid gives violet vapors that turn starch paper blue. The salt may be $KI$ as potassium cation imparts a violet color to borax bead test.