Q.

Nessler’s reagent is

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a

K2HgI4 + NH4OH

b

KHgI4 + NH4OH

c

KHgI4 + NaOH

d

K2HgI4 + KOH

answer is C.

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Detailed Solution

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Nessler's reagent is a Mercury (II) iodide (HgI2​)  solution in potassium iodide (KI) and potassium hydroxide (KOH).

Nessler's reagent is used as confirmatory test for ammonium ion, NH4+.

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