JEE MAIN - Chemistry (2023 - 30th January Evening Shift - No. 1)
Formulae for Nessler's reagent is :
$\mathrm{KHgI}_3$
$\mathrm{HgI}_2$
$\mathrm{KHg}_2 \mathrm{I}_2$
$\mathrm{K}_2 \mathrm{HgI}_4$
Explanation
Nessler's reagent is $$\mathrm{K_2H_g I_4}$$
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