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

Draw the structural formula of methanoic acid.

Which of the following polymer substances is inert towards environmental processes?

What is the boiling point of pure ethanol (in $K$)?

$A$ hydrocarbon,$C_{2}H_{4}$,decolorizes bromine water.
$(i)$ Name the hydrocarbon.
$(ii)$ Mention the family to which it belongs.
$(iii)$ Write the chemical equation of the reaction of this hydrocarbon with hydrogen.

Which biopolymer was first used for post-operative stitches?