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

${\rm{HgC}}{{\rm{l}}_2}$

${\rm{Hg}} + {\rm{HgC}}{{\rm{l}}_2}$

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

Always solid

Highly coloured alloys

Alloys which contain mercury as one of the contents

Compounds of mercury

Dissolving in hot concentrated sulphuric acid

Action of dilute sulphuric acid and air

Heating with sodium sulphate

Heating with sulphur

Gives hardness to steel and can remove oxygen and sulphur

Helps the formation of oxides of iron

Can show highest oxidation state of +7

None of the above

${\rm{CoF}}_6^{3 - }$ and ${\rm{NiCl}}_4^{2 - }$

${\rm{TiF}}_6^{2 - }$ and ${\rm{CoF}}_6^{3 - }$,

${\rm{C}}{{\rm{u}}_2}{\rm{C}}{{\rm{l}}_2}$ and ${\rm{NiCl}}_4^{2 - }$

${\rm{TiF}}_6^{2 - }$ and ${\rm{C}}{{\rm{u}}_2}{\rm{C}}{{\rm{l}}_2}$

Mercurous nitrate

Mercurous chloride

Mercuric nitrate

Mercurous perchlorate

All three are coloured

All three are colourless

Only ${\rm{Z}}{{\rm{n}}^{2 + }}$ is colourless and ${\rm{N}}{{\rm{i}}^{2 + }}$ and ${\rm{C}}{{\rm{r}}^{3 + }}$ are coloured

Only ${\rm{N}}{{\rm{i}}^{2 + }}$ is coloured and ${\rm{Z}}{{\rm{n}}^{2 + }}$ and ${\rm{C}}{{\rm{r}}^{3 + }}$ are colourless

KI solution

KCl solution

${{\rm{K}}_2}{\rm{C}}{{\rm{O}}_3}$ solution

${{\rm{K}}_2}{\rm{S}}{{\rm{O}}_4}$ solution

${\rm{T}}{{\rm{i}}^{3 + }}$

${\rm{M}}{{\rm{n}}^{2 + }}$

${\rm{S}}{{\rm{c}}^{3 + }}$

${\rm{F}}{{\rm{e}}^{2 + }}$

Al, Cu

Zn, Cd

Pb, Sn

Zn, Al

K

Cu

Zn

Al