JEE MAIN - Chemistry (2005 - No. 31)
Calomel $$\left( {H{g_2}C{l_2}} \right)$$ on reaction with ammonium hydroxide gives :
$$HgO$$
$$H{g_2}O$$
$$N{H_2} - Hg - Hg - Cl$$
$$HgN{H_2}Cl$$
Explicação
$$H{g_2}C{l_2} + 2N{H_4}OH\buildrel \, \over
\longrightarrow HgN{H_2}Cl + N{H_4}Cl + 2{H_2}O$$