7. Why does a higher temperature cause a reaction to go faster?
Either there are more collisions per second or the collisions are of greater energy.
There are more collisions per second and the collisions are of greater energy.
Collisions occur with greater energy only.
There are more collisions per second only.

The correct answer is - 5 carbon compounds due to low to high intermolecular forces between their molecules.

Explanation:

Bottle C has gas in it and we know that alkane has carbon and hydrogen only which means they have a single sigma bond between them and very low intermolecular forces in between molecules and are present mostly at gaseous state. Thus, bottle C has alkane.

Alcohols have -OH group that can form rarely two pi bonds which means they have intermediate intermolecular force whereas acids have -cooH group with a high molecular force so bottle B with liquid is alcohol and A has acid.