What is the process in which alkene monomers join end-to-end, or add on to one another, to form chains?
a. daisy polymerization
c. substitution polymerization
b. addition polymerization
d. doldrum polymerization

b. Addition polymerization

Explanation:

Polymerization is a chemical reaction in which small units called as monomers combine together to result into bigger molecules called as polymers.

Condensation polymerization : A chemical reaction in which small units called as monomers are joined to form a bigger molecule called as polymer and small by products are also formed along with the polymer.  Example: Nylon-6

Addition polymerization : A chemical reaction in which small units called as monomers are joined end to end to form a bigger molecule called as polymer.  Example: Polythene

the product of the pressure and volume is also constant

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