Identify the use of $HDPE$.

The polydispersity index of a polymer containing $10$ molecules with molecular mass $1.0 \times 10^4$ and $10$ molecules with molecular mass $1.0 \times 10^5$ is approximately.

Assertion : Bakelite is a thermosetting polymer.
Reason : Bakelite can be melted again and again without any change.

Identify the monomers used to prepare $Bakelite$ from the following.

The number average molecular mass $(M_n)$ and weight average molecular mass $(M_w)$ of a polymer are $30000$ and $40000$ respectively. The polydispersity index $(PDI)$ of the polymer is:

Three-dimensional molecules with cross-links are formed in the case of a