When excess of ${\rm{SnC}}{{\rm{l}}_2}$ is added to a solution of ${\rm{HgC}}{{\rm{l}}_2}$, a white ppt. turning to grey is obtained. This grey colour is due to the formation of:

${\rm{H}}{{\rm{g}}_2}{\rm{C}}{{\rm{l}}_2}$

NEET UG CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

1 Medium

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Understanding +4 | -1

When excess of

\mathrm{SnC}{\mathrm{l}_2}

is added to a solution of

\mathrm{HgC}{\mathrm{l}_2}

, a white ppt. turning to grey is obtained. This grey colour is due to the formation of:

View answer and explanation

Correct option: D

\mathrm{H}{\mathrm{g}_2}

The grey color is due to the formation of mercury (

\mathrm{H}{\mathrm{g}_2}

) because

\mathrm{SnC}{\mathrm{l}_2}

reduces

\mathrm{HgC}{\mathrm{l}_2}

to metallic mercury.