<span>A polymer forms because the hydrocarbon joins with itself in a polymerization reaction.
I really hope this helps! :D</span>
297 j I just took the test
Answer:
Option c
Explanation:
In the allene, 
Central atom forms two sigma bond and two pi bond.
Hybridization of central atom = sp
Hybridization of two terminal C = 
Allene is a nonplanar molecules. This is because of the planes of two
groups which are twisted 90 ° to each other.
Therefore, the two H atoms on one C lie above and below the plane defined by the other
group.
I think only the second option is wrong.