Final answer:
Distilled water is the purest form of water, while bottled water, filtered water, and chlorinated water may contain impurities.
Step-by-step explanation:
Distilled water is considered pure water because it has been boiled and then condensed, removing impurities and minerals. It is the purest form of water as it does not contain any dissolved solids. Bottled water may or may not be pure, depending on the source and the purification process it has undergone. Filtered water and chlorinated water may be free from some impurities, but they are not considered completely pure.
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