Question

what is Nessler'sReagent

Answer 1

hey
Nessler's reagent is used to test for ammonia gas and on presence of Ammonia , it turns brown in colour.

Answer 2

hii mate

here your answer is :-

Potassium tetraiodomercurate , K2 (Hg14) in an alkaline medium like NaOh or KOh , is better known to us as Nessler's reagent.

it is used to the test for the presence if ammonia in inorganic salt. salt containing ammonia turns brown in aqueous medium ,on adding Nessler's reagent

hope it helps you ...THANKS
---jecquiline.