Class 12 Biology Environmental Issues Pollution

Easy

Define $BOD$ (Biochemical Oxygen Demand).

A
Amount of oxygen required for photosynthesis.
B
Amount of oxygen required by bacteria to decompose organic matter in water.
C
Amount of oxygen present in water for aquatic life.
D
Amount of oxygen released by aquatic plants.

Explore More

Browse All

Question Bank

All Subjects

Class 12 Questions

Class 12

Biology Questions

Chapter

Environmental Issues

Subtopic

Pollution

Similar Questions

Is it true that if the dissolved oxygen level drops to zero,the water will become septic? Give an example which could lower the dissolved oxygen content of an aquatic body.

Medium

Acid rain is caused due to an increase in the concentration of which of the following in the atmosphere?

Easy

$SO_{2}$ pollution is indicated by

Easy

Which of the following is normally not an atmospheric pollutant?

As the pollution of organic matter in water increases,what happens to the $BOD$ value?

Medium

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.