In Nessler's reagent for the detection of ammonia the active species is:

H g_{2} C l_{2}

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M g^{+ 2}

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H g_{2} I_{2}

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H g I_{4}^{2 -}

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Solution

The correct option is D $H g I_{4}^{2 -}$
An alkaline solution of K2 Hg I4 is called Nessler’s reagent. This pale solution becomes deeper yellow in the presence of ammonia. At higher concentrations , brown ppt. may form.

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Similar questions

H_{2} C l_{2}

H g I_{4}^{2 -}

In Nessler's reagent for detection of ammonia, the

active species is :

N H_{3}

N H_{3}

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