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Tamil Nadu Board of Secondary EducationHSC Science Class 11

Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted. Reason(R): High biological oxygen demand means high activity of bacteria in water. - Chemistry

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Question

Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted.

Reason(R): High biological oxygen demand means high activity of bacteria in water.

Options

  • Both (A) and R are correct and (R) is the correct explanation of (A)

  • Both (A) and R are correct and (R) is not the correct explanation of (A)

  • Both (A) and (R) are not correct

  • (A) is correct but (R) is not correct

MCQ

Solution

(A) is correct but (R) is not correct

shaalaa.com
Types of Environmental Pollution
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Chapter 15: Environmental Chemistry - Evaluation [Page 279]

APPEARS IN

Samacheer Kalvi Chemistry - Volume 1 and 2 [English] Class 11 TN Board
Chapter 15 Environmental Chemistry
Evaluation | Q I. 15. | Page 279
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