Which of the following processes develops cross-links in elastomer?

Ethylene on reaction with cold, dilute alkaline $KMnO_4$ at $273 \ K$ gives a compound '$P$'. This on polymerisation with which of the following gives dacron?

Which of the following polymers is also known as $Dacron$?

Which polymer is obtained from the monomers $CH_2=CH-CH=CH_2$ and $CH_2=CH-CN$?

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 $,000$)

The intermolecular forces present in $Nylon-6,6$ are........