Which biopolymer was first used for post-operative stitches?

Write the balanced chemical equations for the following reactions and identify the type of reaction in each case.
$(a)$ Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated $H_2SO_4$.
$(b)$ Ethene is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.

Mention the functional group which always occurs at the terminal position of a carbon chain of an organic compound.

What is the monomer unit of Teflon?

Draw the electron-dot structure for ethyne. $A$ mixture of ethyne and oxygen is burnt for welding. In your opinion,why cannot we use a mixture of ethyne and air for this purpose?

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