Question

20. Give two examples for each of the following:

(b). Compounds

Answer 1

• A pure substance that consists of two or more elements chemically combined in a fixed ratio is called a compound.
• It can be broken down into simpler substances by chemical methods.
• Water$\left({\mathrm{H}}_2\mathrm{O}\right)$, common salt$\left(\mathrm{NaCl}\right)$ or Sodium chloride, and sugar$\left({\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}\right)$ or Sucrose are examples of compounds.