Q41
Increase in concentration of the toxicant at successive trophic levels is known as :
Correct Answer
Option A
Solution
Biomagnification means an increase in concentration of toxins through the trophic levels of a food chain.
Environmental Issues
Q42
The UN conference of Parties on climate change in the year 2012 was held at :
Correct Answer
Option C
Solution
This conference occured from 20 Nov to 8 December, 2012 to extend the life of the Kyoto Protocol at Doha in Qatar.
Q43
Acid rain is caused by increase in the atmospheric concentration of -
Correct Answer
Option D
Solution
Acid rain is caused by large scale emission of acidic gases into the atmosphere from thermal power plants, industries and automobiles.
Sulphur dioxide and nitrogen oxides are changed in the atmosphere into sulphuric acid and nitric acid.
Q44
Which of the following are most suitable indicators of SO 2 pollution in the environment?
Correct Answer
Option D
Solution
Lichens cannot grow in places where sulphur dioxide is present in the environment.
Q45
The UN Conference of Parties on climate change in the year 2011 was held in :
Correct Answer
Option D
Solution
The UN Conference of Parties on climate change in 2011, was held in Durban, South Africa.
It aimed at decrease of pollutant emission.
Q46
High value of BOD (Biochemical Oxygen Demand) indicates that :
Correct Answer
Option B
Solution
Biochemical oxygen demand or BOD is the oxygen required for microbial decomposition of a unit mass of organic remains.
A higher BOD of a river indicates that water is highly polluted.
Q47
Rachel Carson's famous book Silent Spring is related to:
Correct Answer
Option B
Solution
Rachel Carson's book 'Silent Spring' reveals the harmful effect of DDT, a fatal pesticide.
Q48
Which of the following is not one of the prime health risks associated with greater UV radiation through the atmosphere due to depletion of stratospheric ozone?
Correct Answer
Option A
Solution
UV-B radiations damage skin cells, cause ageing of skin, skin cancer and eye damage.
Liver cancer is not a prime health risk from UV-B radiation.
Q49
The zone of atmosphere in which the ozone layer is present is called :
Correct Answer
Option B
Solution
The ozone (O 3) found in upper part of the atmosphere, i.e., Stratosphere, is Good ozone, since, it acts as a shield for absorbing UV-radiations from sun.
Q50
A scrubber in the exhaust of a chemical industrial plant removes :
Correct Answer
Option D
Solution
Dust separation is carried out by scrubbers.
Both dry and wet scrubbers can be used to separate particulate matter but more commonly they are employed in removing gaseous pollutants like SO 2.
Ready for a full NEET mock test?
Timed · full syllabus · instant results
Take a Mock Test →