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  • When a mixture of solid , solid <img alt="\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}" src="ht

When a mixture of solid \mathrm{NaCl}, solid \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} is heated with conc. \mathrm{H}_{2} \mathrm{SO}_{4}, orange red vapours are obtained of the compound

Option: 1

Chromous chloride


Option: 2

Chromyl chloride


Option: 3

Chromic chloride


Option: 4

Chromic sulphate


Answers (1)

best_answer

The given test is a confirmatory test for Chloride ions which upon reaction with Potassium Dichromate in the presence of Sulphuric Acid produces Orange red vapors of Chromyl chloride. 

The reaction is given below :

\mathrm{4 NaCl + K _{2} Cr _{2} O _{7}+6 H _{2} SO _{4} \longrightarrow 2 KHSO _{4} +\underset{\text{Chromyl Chloride}}{2 CrO _{2} Cl _{2}}+4 NaHSO _{4}+3 H _{2} O }

Hence, the correct answer is Option (2)

Posted by

avinash.dongre

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