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Q: The measure of absorption or scattering of light by the suspended materials present in the water is known as ........
  • A. Alkalinity
  • B. Colour
  • C. Hardness
  • D. Turbidity
Correct Answer: Option D - Turbidity is measure of the extent to which light is either absorbed or scattered by suspended material on water. Turbidity is due to colloidal materials like clay, silt, rock fragments, metal oxides and microorganisms. • Turbidity is expressed in standard unit called JTU (Jackson Turbidity Unit) which is based on absorption principal.
D. Turbidity is measure of the extent to which light is either absorbed or scattered by suspended material on water. Turbidity is due to colloidal materials like clay, silt, rock fragments, metal oxides and microorganisms. • Turbidity is expressed in standard unit called JTU (Jackson Turbidity Unit) which is based on absorption principal.

Explanations:

Turbidity is measure of the extent to which light is either absorbed or scattered by suspended material on water. Turbidity is due to colloidal materials like clay, silt, rock fragments, metal oxides and microorganisms. • Turbidity is expressed in standard unit called JTU (Jackson Turbidity Unit) which is based on absorption principal.