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Question:
Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is
Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is
Updated On: Jun 14, 2022
- Cr$O_3$
- $Cr_2O_3$
- Cr
- CO
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The Correct Option is B
Solution and Explanation
Ammonium dichromate [(NH$_4)_2Cr_2O_7$ ]on heating decomposes producing green powder of Cr$_2O_3$ and N$_2$(g) is evolved
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Concepts Used:
D and F Block Elements
The d-block elements are placed in groups 3-12 and F-block elements with 4f and 5f orbital filled progressively. The general electronic configuration of d block elements and f- block elements are (n-1) d 1-10 ns 1-2 and (n-2) f 1-14 (n-1) d1 ns2 respectively. They are commonly known as transition elements because they exhibit multiple oxidation states because of the d-d transition which is possible by the availability of vacant d orbitals in these elements.
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