WBJEE · Chemistry · d and f Block Elements
Which of the following statement(s) is (are) correct when a mixture of \(\mathrm{NaCl}\) and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) is gently warmed with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4} ?\)
- A A deep red vapour is evolved
- B The vapour when passed through NaOH solution, gives a yellow solution
- C Chiorine gas is also evolved
- D Chromyl chioride is formed
Answer & Solution
Correct Answer
(D) Chromyl chioride is formed
Step-by-step Solution
Detailed explanation
(A) When \(\mathrm{NaCl}\) and \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) warmed with \(\mathrm{H}_{2} \mathrm{SO}_{4}\) (i.e. in acidic medium), they produce deep red vapours of chromyl chloride \(\left(\mathrm{CrO}_{2} \mathrm{Cl}_{2}\right)\) (B) When NaOH is passod,…
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