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NTA Abhyas JEE Main2020Chemistryd and f Block ElementsPractice

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

Options

  1. ACrO 3
  2. BCr
  3. CCO
  4. DCr 2 O 3

Correct answer

D. Cr 2 O 3

Step-by-step solution

Ammonium dichromate [ ( NH 4 ) 2 Cr 2 O 7 ] on heating decomposes producing green powder of Cr 2 O 3 and N 2 ( g ) is evolved.

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