P-Block Elements Ques 125

Question: A salt, which on heating with conc. $ H_2SO_4 $ gives violet vapours, is

[CPMT 1971]

Options:

A) Iodide

B) Nitrate

C) Sulphate

D) Bromide

Show Answer

Answer:

Correct Answer: A

Solution:

$ KI+\underset{Conc\text{.}}{\mathop{H_2SO_4}}\xrightarrow{\Delta }KHSO_4+HI $ Conc. $ \underset{\begin{smallmatrix} \text{ }\text{ Violet} \\ \text{ }\text{vapour } \end{smallmatrix}}{\mathop{H_2SO_4+2HI\to 2H_2O+I_2+SO_2}}\uparrow $



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