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Which of the following statements is/are...

Which of the following statements is/are correct, when a mixture of `NaCl` and `K_2Cr_2O_7` is gently warmed with concentrated `H_2SO_4`?

A

Deep red vapours are evolved.

B

The vapours when passed into NaOH solution give a yellow solution of `Na_2CrO_4`.

C

Chlorine gas is evloved.

D

Chromyl chloride is formed.

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
`K_2Cr_2O_7+6H_2SO_4+4NaClto2KHSO_4+4NaHSO_4+2CrO_2Cl_2+3H_2O`
Orange-red vapours of `CrO_2Cl_2` are produced. When these vapours are passed through `NaOH`, a yellow solution of `Na_2CrO_4` is produced.
`CrO_2Cl_2+4NaOHtoNa_2CrO_4+2H_2O+2NaCl`
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