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     EduGorilla 
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    What happens when a mixture of NaCl and K2Cr2O7 is gently warmed with conc. H2SO4?

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    1. A deep red vapour is evolved.

    2. The vapour when passed into NaOH solution gives a yellow solution of Na2CrO4

    3. Chlorine gas is evolved.

    4. Chromyl chloride is formed.

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