Home
Class 12
CHEMISTRY
Ammonium dichromate on heating gives...

Ammonium dichromate on heating gives

A

`CrO_(3)`

B

`Cr_(2)O_(3)`

C

CrO

D

`CrO_(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Ammonium dichromate, dichromate, `(NH_(4))_(2)Cr_(2)O_(7)`, is often used in ''volcano'' demonstrations. If a red - hot wire or a lit match is touched to a pile of ammonium dichromate exothermic decomposition is intiated, emitting sparks and water vapor in a spectacular way. However, this is not a safe demonstration because a dust containing carcinogenic chromium `(+6)` copounds is usually relesed. The reaction is nonstoichlimetric, producing chromium (III) oxide, water vapor, nitrogen gas, and some ammonia gas. It is commonly represented as
`(NH_(4))_(2) Cr_(2)O_(7)(s)` `overset (Delta) rarr` `Cr_(2)O_(3)(s) + N_(2)(g) + 4H_(2)(s)`
Promotional Banner

Topper's Solved these Questions

  • THE D AND F BLOCK ELEMENTS

    R SHARMA|Exercise Follow-up Test 5|9 Videos

  • THE D AND F BLOCK ELEMENTS

    R SHARMA|Exercise Follow-up Test 6|6 Videos

  • THE D AND F BLOCK ELEMENTS

    R SHARMA|Exercise Follow-up Test 3|11 Videos

  • SURFACE CHEMISTRY

    R SHARMA|Exercise Archives|18 Videos

  • THE P BLOCK ELEMENTS

    R SHARMA|Exercise Archieves|62 Videos

Similar Questions

Explore conceptually related problems

Ammonium dichromate on heating liberates a gas. The same gas will be obtained by :

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 .

Ammonium hydroxide on heating gives _______ and _________.

Ammonium chloride on heating gives NH_3 and HCI ,which on cooling again form ammonium chloride. This reaction is called

Ammonium cyanate on heating gives an organic compound 'x'.Compound 'x' and its IUPAC name is