Write a balanced chemical equation for the following reaction and classify it.

Hydrogen sulphide gas reacts with Oxygen gas to form solid Sulphur and liquid water.  

Balance the following chemical equation and identify the type of chemical reaction.

$\mathrm{Mg} \left(\mathrm{s}\right)+{\mathrm{Cl}}_2 \left(\mathrm{g}\right) \stackrel{ }{\to } {\mathrm{MgCl}}_2 \left(\mathrm{s}\right)$

Balance the following chemical equation and identify the type of chemical reaction.

$\mathrm{HgO} \left(\mathrm{s}\right) \stackrel{ \mathrm{Heat} }{\to } \mathrm{Hg}\left(\mathrm{l}\right)+{\mathrm{O}}_2 \left(\mathrm{g}\right)$

Balance the following chemical equation and identify the type of chemical reaction.

 $\mathrm{Na} \left(\mathrm{s}\right)+\mathrm{S}\left(\mathrm{s}\right) \stackrel{\mathrm{Fuse} }{\to } {\mathrm{Na}}_2\mathrm{S}\left(\mathrm{s}\right)$

Balance the following chemical equation and identify the type of chemical reaction.

 ${\mathrm{TiCl}}_4 \left(\mathrm{l}\right)+\mathrm{Mg} \left(\mathrm{s}\right) \stackrel{ }{\to } \mathrm{Ti} \left(\mathrm{s}\right)+2 {\mathrm{MgCl}}_2 \left(\mathrm{s}\right)$

Balance the following chemical equation and identify the type of chemical reaction.

 $\mathrm{CaO} \left(\mathrm{s}\right)+{\mathrm{SiO}}_2 \left(\mathrm{s}\right) \stackrel{ }{\to } {\mathrm{CaSiO}}_3 \left(\mathrm{s}\right)$

Balance the following chemical equation and identify the type of chemical reaction.

 ${\mathrm{H}}_2{\mathrm{O}}_2 \left(\mathrm{l}\right) \stackrel{ \mathrm{UV} }{\to } {\mathrm{H}}_2\mathrm{O} \left(\mathrm{l}\right)+{\mathrm{O}}_2 \left(\mathrm{g}\right)$

A magnesium ribbon is burnt in oxygen to give a white compound $\mathrm{X}$ accompanied by emission of light. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound $\mathrm{Y}$.

Write the chemical formula of $\mathrm{X}$ and $\mathrm{Y}$.