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  • Sodium nitroprusside when added to an alkaline solution of sulphide ions produce aOption: 1 Red colouration<str

Sodium nitroprusside when added to an alkaline solution of sulphide ions produce a

Option: 1

Red colouration


Option: 2

Blue colouration


Option: 3

Purple colouration


Option: 4

Brown colouration


Answers (1)

best_answer

As we have learnt, 

The presence of Sulphide ions in solution is detected by the addition of Sodium nitroprusside which gives a violet colouration due to the formation of Sodium thio nitroprusside. The reaction is given below

\mathrm{Na _{2} S + \underset{Sodium\ Nitroprusside}{Na _{2}\left[ Fe ( CN )_{5}( NO )\right]} \rightarrow \underset{Purple\ Colour}{Na _{4}\left[ Fe ( CN )_{5} NOS \right]}}

Hence, the correct answer is Option (3)

Posted by

Kuldeep Maurya

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