HARD
12th CBSE
IMPORTANT
Earn 100

With the help of a flowchart, exhibit the events of eutrophication.

Important Questions on Environmental Issues

MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 9
"Determination of biological oxygen demand (BOD) can help in suggesting the quality of a water body" Explain.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 10
Name any two pieces where it is essential to install electrostatic precipitators. Why it is required to do so?
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 10
Mention one limitation of an electrostatic precipitator.
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 11
Explain the effect on the characterisation of a river when urban sewage is discharged into it.
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 1
What is meant by Ozone shield? Name two ozone depleting substances. How to the ozone depleting substances affect the ozone shield? Write one demanding effect on ozone depletion on humans and plants respectively
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 2
List any four factors which determine the amount of dissolved oxygen in the water. Explain in brief the harmful effect of nitrate, fluoride and arsenic salt in groundwater of humans.
HARD
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 3
Write in detail about the ill effects of air pollution. 
MEDIUM
12th CBSE
IMPORTANT
TRUEMAN'S ELEMENTARY Biology VOL. II For XII Class of 10+2>Chapter 16 - Environmental Issues>TEST QUESTIONS>Q 4
What is EI Nino effect? Explain how it accounts for biodiversity loss.