Environmental Science MCQs

✅ The correct answer is option C.
Decomposers and scavengers are those which decomposes the waster organic matter and release energy back in the environment. Hence, they are also called as nature’s cleaner. They are present in the apex of the pyramid. Thus, the correct answer is ‘Decomposers and scavengers.

✅ The correct answer is option A.
Diarrhoea is not created by noise pollution.

✅ The correct answer is option C.
Ethanol mixed with diesel reduces carbon monoxide emissions up to 50%.

✅ The correct answer is option B.
Nitrosomonas convert ammonia into nitrates by a process called nitrification. It is performed in two steps – nitrite formation and nitrate formation.

✅ The correct answer is option B.

✅ The correct answer is option A.
Point Calimere sanctuary is situated in Tamil Nadu.

✅ The correct answer is option C.
Pottery workers are at high risk of silicosis lung disease.

✅ The correct answer is option B.
All are primary pollutants except Peroxyacetyl Nitrate (PAN).

✅ The correct answer is option B.
The tropical rainforest has highest annual net primary productivity (9000 K cal / m2 / yr).

✅ The correct answer is option C.
A halophyte is a plant, that grows in waters of high salinity, coming into contact with saline water through its roots or by salt spray, such as in saline semi-deserts, mangrove swamps, marshes and sloughs, and seashores.