Which of the following statement (s) is/are correct when a mixture of NaCl and `K_(2)Cr_(2)O_(7)` si gently warmed with conc. `H_(2)SO_(4)`?
(I) A deep red vapour is evoleved. ltbr4gt (II) The vapour when passes into NaOH solution gives a yellow solution of `Na_(2)CrO_(4)`.
(III) Chomyl chloride is formed.
Choose the coorect option.

Options

A. I and II
B. I, II and III
C. I,II and IV
D. III and Iv

Answer

C

Explanation

On warming the mixture of NaCl and `K_(2)Cr_(2)O_(7)` gently with conc. `H_(2)SO_(4)` a deep red vapour is evolved. When it is passed into NaOH solution , gives a yellow solution of `Na_(2)CrO_(4)` and chromyl chloride.