Calomel ( Hg 2 Cl 2 ) on reaction with ammonium hydroxide gives, HgNH 2 Cl, NH 2 − Hg − Hg − Cl, Hg 2 O, HgO

Hg Cl + 2 NHOH ⟶ Hg + Hg ( NH 2 ) Cl + NH 4 Cl + 2 H 2 O

Calomel ( Hg 2 Cl 2 ) on reaction with ammonium hydroxide gives

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Calomel $\left(\mathrm{Hg}_2 \mathrm{Cl}_2\right)$ on reaction with ammonium hydroxide gives

ChemistryRedox ReactionsJEE MainJEE Main 2005

Options:

A
$\mathrm{HgNH}_2 \mathrm{Cl}$
B
$\mathrm{NH}_2-\mathrm{Hg}-\mathrm{Hg}-\mathrm{Cl}$
C
$\mathrm{Hg}_2 \mathrm{O}$
D
$\mathrm{HgO}$

Solution:

1913 Upvotes Verified Answer

The correct answer is:
$\mathrm{HgNH}_2 \mathrm{Cl}$

$\mathrm{Hg} \mathrm{Cl}+2 \mathrm{NHOH} \longrightarrow \mathrm{Hg}+\mathrm{Hg}\left(\mathrm{NH}_2\right) \mathrm{Cl}+\mathrm{NH}_4 \mathrm{Cl}+2 \mathrm{H}_2 \mathrm{O}$

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