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  • A mixed oxide of iron and chromium is fused with sodium carbonate in free access of air to form a yellow coloured compound (A). On acidification the compound (A) forms an orange coloured compound (B), which is a strong oxidizing agent. Identify compoun

A mixed oxide of iron and chromium is fused with sodium carbonate in free access of air to form a yellow coloured compound (A). On acidification the compound (A) forms an orange coloured compound (B), which is a strong oxidizing agent. Identify compound (A) and (B). Write chemical reactions involved.

 

 

 

 
 
 
 
 

Answers (1)

4FeCr_2O_4 + 8Na_2CO_3 + 7O_2\rightarrow\underset{(\text{Yellow}) }{8Na_2Cr_2O_4} + 2Fe_2O_3 +8CO_2

A = \text{N}_2\text{CrO}_4

 

2Na_2CrO_4 + H_2SO_4 \rightarrow \underset{\text{(orange)}}{Na_2Cr_2O_7} + Na_2SO_4 + H_2O

B = \text{Na}_2\text{Cr}_2\text{O}_7

Posted by

Sumit Saini

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