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Why a filter paper dipped in potassium iodide turns brown when brought near HNO3 vapours

Asked by lovemaan5500 23rd October 2017, 5:23 PM
Answered by Expert
Answer:
when filter paper dipped in potassium iodide brought near to HNO3 fumes, they form brown coloured iodine and nitrogen dioxide gas. 
 
2 K I space plus space 4 H N O subscript 3 space rightwards arrow with blank on top I subscript 2 space plus space 2 N O subscript 2 space plus space 2 K N O subscript 3 space plus space 2 H subscript 2 O
 
Answered by Expert 24th October 2017, 12:14 PM
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