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Ammonium dichromate is used in some fire...

Ammonium dichromate is used in some fireworks. The green-coloured powder blown in the air is

A

`Cr`

B

`CrO_(3)`

C

`Cr_(2)O_(3)`

D

`CrO (O_(2))`

Text Solution

Verified by Experts

The correct Answer is:
C
`(NH_(4))_(2) Cr_(2) O_(7) overset(Delta)rarr 2K_(2) CrO_(4) + Cr_(2) O_(3) + (3)/(2) O_(2)`
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Assertion. Change in colour of acidic solution of potassium dichromate by breath is used to test drunken drivers. Reason. Change in colour is due to the complexation of alcohol with potassium dichromate.

(NH_(4))_(2)Cr_(2)O_(7) (ammonium dichromate) is used in fire works. The green coloured powder blown in air is:

Knowledge Check

  • Ammonium dichromate is used in some fireworks. The green coloured powder blown is

    A
    `CrO_3`
    B
    `Cr_2O_3`
    C
    Cr
    D
    `CrO (O_2)`

  • Ammonium dichromate is used in some fire works. The green coloured powder blown in air is

    A
    `CrO_(3)`
    B
    `Cr_(2)O_(3)`
    C
    Cr
    D
    `CrO(O_(2))`

  • (NH_(4))_(2)Cr_(2)O_(7)( Ammonium dichromate ) is used in fire works. The green coloured powder blown in air is

    A
    `Cr_(2)O_(3)`
    B
    `CrO_(2)`
    C
    `Cr_(2)O_(4)`
    D
    `CrO_(3)`

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    Which of the following statement (s) is /are correct? (I) In acidic solution dichromate ions are converted to chromate ions . (II) An acidified solution of K_(2)Cr_(2)O_(7) liberates iodine from iodides. (III) Potassium dichromate is used as a titrant for Fe^(2+) ions. (IV) Ammonium dichromate on heating undergo exothermic decomposition to give Cr_(2)O_(3) . Choose the correct option .

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