Question

Write a chemical equation when (ii) Cinnabar is heated in the presence of air

Answer 1

Chemical reactions:

• The process of two or more molecules interacting to create a new product is known as a chemical reaction.
• Reactants are substances that interact to make new substances, whereas products are those substances that result from the interaction.

In the presence of air, cinnabar gets heated.

• Cinnabar is the popular term for mercurous sulphate, and its molecular formula is $\mathrm{HgS}$, as we all know.
• For the above chemical process, the balanced chemical equation is:
• $$\begin{gathered} 2\mathrm{HgS}\left(\mathrm{s}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2\mathrm{HgO}\left(\mathrm{s}\right)+2{\mathrm{SO}}_2\left(\mathrm{g}\right) \\ \mathrm{Mercuric}\mathrm{Oxygen}\mathrm{Mercuric}\mathrm{Sulfur}\mathrm{dioxide} \\ \mathrm{Sulphide}\mathrm{Oxide} \end{gathered}$$.