What is the common name of ethanal?

Which two of the following compounds belong to the same homologous series?
$C_{2}H_{6}O, C_{2}H_{6}O_{2}, C_{2}H_{6}, CH_{4}O$

What happens when: $(i)$ ethanol is burnt in air and $(ii)$ it is oxidized? Write the corresponding reaction equations.

Catenation is the ability of an atom to form bonds with other atoms of the same element. It is exhibited by both carbon and silicon. Compare the ability of catenation of the two elements. Give reasons.

Write any three physical properties and three uses of ethanol.

What are oxidising agents? State two oxidising agents. Write one chemical equation using an oxidising agent.