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When K(2)Cr(2)O(7) is heated with conc. ...

When `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2)SO_(4)` and soluble chloride such as KCl :

A

red vapours of `CrO_(2)Cl_(2)` are evolved

B

`Cl^(-)` ion is oxidized to `Cl_(2)` gas

C

`CrCl_(3)` is formed

D

`Cr_(2)O_(7)^(2-)` ion is reduced to green `Cr^(3+)` ion

Text Solution

Verified by Experts

The correct Answer is:
A
`KCl +H_(2)SO_(4)+K_(2)Cr_(2)O_(7) to CrO_(2)Cl_(2)` (Chromyl Chloride test)
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Knowledge Check

  • When a mixture of solid NaCl, solid K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) orange red vapours are obtained. These are of the compound

    A
    chromous chloride
    B
    chromyl chloride
    C
    chromic chloride
    D
    chromic sulphate

  • When a mixture of solid NaCl , solid K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) , orange red vapours are obtained of the compound

    A
    Chromous chloride
    B
    Chromyl chloride
    C
    Chromic chloride
    D
    Chromic sulphate

  • A solid mixture of AgCl ad K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) and produces:

    A
    greenish yellow gas
    B
    colourless gas
    C
    red coloured gas
    D
    no gas

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