Environmental Science MCQs

✅ The correct answer is option C.
World Water Day is held annually on 22 March as a means of focusing attention on the importance of freshwater and advocating for the sustainable management of freshwater resources. This Day is an opportunity to learn more about water related issues, be inspired to tell others and take action to make a difference.

✅ The correct answer is option D.
Habitat loss and fragmentation is the most important cause driving animals and plants to extinction.

✅ The correct answer is option B.
MoEF means Ministry of Environment and Forests.

✅ The correct answer is option C.
Lichens are the best indicator of environmental pollution mainly SO2.

✅ The correct answer is option A.
Aerosols are tiny solid or liquid particles that are suspended in the air. Most aerosols are microscopic and too small to see individually without a microscope. Aerosols include things like dust, pollen, smoke, and even cloud droplets.

✅ The correct answer is option A.
Although the units for sound intensity are technically watts per meter squared, it is much more common for it to be referred to as decibels, dB. A decibel is a ratio of the observed amplitude, or intensity level to a reference, which is 0 dB.

✅ The correct answer is option A.

✅ The correct answer is option B.
The combination of nitrogen oxides and hydrocarbons in the presence of the sunlight causes smog.

✅ The correct answer is option D.
Acclimatisation is the process in which an individual organism adjusts to a change in its environment (such as a change in altitude, temperature, humidity, photoperiod, or pH), allowing it to maintain performance across a range of environmental conditions. Hence, the correct answer is ‘Acclimatisation’.

✅ The correct answer is option A.