The table describes how some substances were formed. Substance
Р
Q
R.
Description
Formed by boiling pure water
Formed by combining three hydrogen atoms to every nitrogen atom
Formed by adding 5 g of sugar to 1 L of water
Formed by compressing carbon under high pressure
S
Based on the given descriptions, which substance is most likely a mixture?
P
ОООО
S

C). Formed by adding 5 g of sugar to 1 L of water.

Explanation:

The Mixture is described as the material that consists of a physical collaboration of two or more substances together.

In the given table, the addition of 5g of sugar to 1L of water exemplifies a mixture as the two different substances are combined together physically.  The substances are combined together in a manner that no chemical reaction takes place and identities are retained. The other options do not display a second substance and thus, cannot be characterized as a mixture. Therefore, option C is the correct answer.