What is the next higher homologue of methanol (CH₃OH)?

70 Which of the following hydrocarbons is unsaturated?

C₃H₄; C₂H₆;

1 Write the molecular formula of ethanol. 3 Identify the functional group present in the following compound and name it according to IUPAC system: CH₃OH 4 Give the common name and IUPAC name of the simplest aldehyde.