When a mixture of solid \( \mathrm{NaCl} \) and solid \( \mathrm{K}...

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When a mixture of solid \( \mathrm{NaCl} \) and solid \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \) is heated with concentrated \( \mathrm{H}_{2} \mathrm{SO}_{4} \), deep red vapours are obtained.
P This is due to the formation of :
W)
(a) chromous chloride
(b) chromyl chloride
(c) chromic chloride
(d) chromic sulphate
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