Question

Which of the following statement (s) is (are) correct when a mixture of NaCl and `K_(2)Cr_(2)O_(7)` is gently warmed with conc. `H_(2)SO_(4)`
A. A deep red vapour is evolved
B. The vapours when passed into NaOH solution gives a yellow solution of `Na_(2)CrO_(4)`
C. Chlorinegas is evolved
D. Chromyl chloride is formed

Answer 1

Correct Answer - A::B::D
The reactions are `4NaCl+K_(2)Cr_(7)O_(7)=6H_(2)SO_(4)to2CrO_(2)Cl_(2)+4Naunderset(("Red vapours"))(HSO_(4)+2KH)SO_(4)+3H_(2)O,underset("Chromyl chloride")(CrO_(2)Cl_(2))+4NaOH to underset("yellow solution")(Na_(2)CrO_(4))+2NaCl+2H_(2)O`