Which of the following is a biodegradable synthetic polymer?

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 polymer is used in controlled-release drug capsules?

What is the monomer of natural rubber?

Explain the given reactions with examples:
$(a)$ Saponification reaction
$(b)$ Combustion reaction

Which catalyst is used in the Fischer-Tropsch process to synthesize hydrocarbons or oxygenated compounds like propanone?