Question

Coke floats on water when dissolved, this is due to the presence of -- in it.

Answer 1

Hint: Coke is a popular carbonated drink. It consists of carbonated water, flavouring agents, and colourants usually. The water contains hydrogen bonds and is polar in nature. The floating of coke over water can be explained with the help of the concept of density. The less dense liquid floats over the high-density liquid.

Complete answer:
Coke is a carbonated drink and hence contains dissolved air in high amounts. This dissolved air is present between the carbon atoms. The air gaps present in coke cause lesser density of coke. As coke is less dense than the water, it floats on it.
Thus, coke floats on water when dissolved, this is due to the presence of air gaps in it.
Hence, the correct word to be filled in the gap is “air gaps”

Note:
If we want to submerge the coke into water then by increasing its sugar content, we can do so. Higher sugar content increases the density of the coke and then it will be more dense than water and gets submerged. Similar studies have been done with the coke can, diet coke can and the drink itself.