I believe the answer is D
Answer:
A. a technique that separates amino acids on the basis of their polarity
Explanation:
Pure water would be classified as non-conductor since it does not allow the flow of current into the solution. It does not contains any ions or free electrons so it cannot allow the flow of current into the system. It can allow current only when any impurities is present like salts.
Answer:
There is a physical change as the water is evaporating, producing a gas.