What happens when quick lime is added to water?

Classify the following reaction as combination, decomposition, displacement or double displacement.

$2\mathrm{CuO}\left(\mathrm{s}\right)\to 2\mathrm{Cu}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

Classify the following reaction as combination, decomposition, displacement or double displacement.
$2{\mathrm{KClO}}_3\left(\mathrm{s}\right)\to 2\mathrm{KCl}\left(\mathrm{s}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)$

Classify the following reaction as combination, decomposition, displacement or double displacement.
$\mathrm{Zn}\left(\mathrm{s}\right)+2{\mathrm{AgNO}}_3\left(\mathrm{aq}\right)\to \mathrm{Zn}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{aq}\right)+2\mathrm{Ag}\left(\mathrm{s}\right)$

Classify the following reaction as combination, decomposition, displacement or double displacement.
$\mathrm{MgO}\left(\mathrm{s}\right)+\mathrm{C}\left(\mathrm{s}\right)\stackrel{\mathrm{At} \mathrm{high} \mathrm{temperature}}{\to }\mathrm{CO}\left(\mathrm{g}\right)+\mathrm{Mg}\left(\mathrm{s}\right)$

Classify the following reaction as a combination, decomposition, displacement, or double displacement.
$\mathrm{Ni}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{aq}\right)+2\mathrm{NaOH}\left(\mathrm{aq}\right)\to \mathrm{Ni}{\left(\mathrm{OH}\right)}_2\downarrow +2{\mathrm{NaNO}}_3\left(\mathrm{aq}\right)$

Identify whether the given reaction is combination reaction, displacement reaction, decomposition reaction or double displacement reaction.

${\mathrm{NH}}_3+\mathrm{HCl}\to {\mathrm{NH}}_4\mathrm{Cl}$