100. What is the role of ultraviolet (UV) radiation in the water purification systems? [2012-I]

i) It inactivates /kills the harmful microorganisms in water.

ii) It removes all the undesirable odours from the water.

iii) It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water.

Which of the statements given above is/are correct?

a) i only

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b) ii and iii only

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c) i and iii only

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d) i, ii and iii

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Solution

The correct option is A
a) i only

Ans a

Ultraviolet radiation inactivates / kills harmful micro-organisms in water only.

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The correct option is A a) i only Ans a Ultraviolet radiation inactivates / kills harmful micro-organisms in water only.

The correct option is A
a) i only

Ans a

Ultraviolet radiation inactivates / kills harmful micro-organisms in water only.