Which one of the following is used in the preparation of cellulose nitrate?

What is the monomer of polystyrene?

Phenol and formaldehyde undergo condensation to give a polymer $(A)$ which on heating with formaldehyde gives a thermosetting polymer $(B)$. Name the polymers. Write the reactions involved in the formation of $(A)$. What is the structural difference between the two polymers?

Which of the following polymers is used in the preparation of cinema films?

Which of the following household plastic materials is used to prepare drinking straws?

The number average molecular mass of a polymer that contains $15$ molecules with each of mass $8,000$ and $15$ molecules with each of mass $80,000$ is: (in $,000$)