What is the boiling point of methanal (in $,K$)?

Look at the figure and answer the following questions:
$(a)$ If ethanol is used instead of ethanoic acid,would you expect the same change?
$(b)$ How can a solution of lime water be prepared in the laboratory?

Which gas is produced during the process of fermentation that causes effervescence?

The soap molecule has a

Ethene is formed when ethanol at $443\, K$ is heated with excess of concentrated sulphuric acid. What is the role of sulphuric acid in this reaction? Write the balanced chemical equation of this reaction.

What is the molecular formula of methanal?