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ICSE Class 10 Answered

What is an orange crystal which gives out red sparks  
Asked by dhritichandan1 | 23 Dec, 2018, 04:49: PM
answered-by-expert Expert Answer
Ammonium dichromate (NH4)2Cr2O7 decomposes, it gives off orane spark and produce green chromium(III) oxide Cr2O3 nitrogen gas and water vapours. This decomposition of Ammonium dichromate is looks like a miniature volcanic eruption. the reaction occurs as follows:
 
 
(NH4)2Cr2O7(s) + heat → Cr2O3(s) + N2(g) + 4H2O(g)
Answered by Ramandeep | 25 Dec, 2018, 07:04: PM

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