A solid salt mixture upon heating with solid and concentrated is expected to yield deep red vapors of chromyl chloride. However, this test will explicitly FAIL if the chloride present in the salt is:

Question

A solid salt mixture upon heating with solid $K_2Cr_2O_7$ and concentrated $H_2SO_4$ is expected to yield deep red vapors of chromyl chloride. However, this test will explicitly FAIL if the chloride present in the salt is:

Prashant Kotian · Accepted Answer

Correct answer: C. The chromyl chloride test requires free ions to react. Heavy metal chlorides with significant covalent character, such as , and , do not ionize sufficiently in the concentrated acid medium, preventing the formation of vapors.

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