Discussion
Unit of turbidity of water is :
Answer: D
The answer is All of the above.
All three are turbidity units. The JTU (Jackson Turbidity Unit) comes from the old Jackson candle turbidimeter. The FTU (Formazin Turbidity Unit) is based on a formazin polymer standard. The NTU (Nephelometric Turbidity Unit) is measured with a nephelometer that reads scattered light at 90°, and is the unit used by the BIS and WHO drinking-water standards today.
For formazin standards NTU and FTU give the same numbers, so choosing any single one would leave out units that are equally valid for turbidity.
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