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Environmental Issues · Question 29

AIPMT 2015MCQEasy📈 Topic in 12% papers+4−1
1

Eutrophication of water bodies leading to killing of fishes is mainly due to nonavailability of

  1. light
  2. food
  3. essential minerals
  4. oxygen

Answer

(4) oxygen

Solution

As per NCERT, eutrophication is the natural ageing of a lake by nutrient enrichment of its water.

⇒ Nitrates and phosphates from sewage and fertiliser run-off cause excessive growth of algae (algal bloom).

⇒ Decomposition of the dead algae by microbes uses up the dissolved oxygen, so the BOD of the water rises.

∴ Fishes die mainly due to non-availability of dissolved oxygen.

Answer: (4)

Out of syllabusAIPMT 2015

Keep practising — Environmental Issues

2

The UN conference of Parties on climate change in the year 2012 was held at:

  1. Lima
  2. Warsaw
  3. Doha
  4. Durban
Out of syllabusAIPMT 2015
3

Which of the following are most suitable indicators of SO2 pollution in the environment?

  1. Conifers
  2. Fungi
  3. Algae
  4. Lichens
Out of syllabusAIPMT 2015
4

Increase in concentration of the toxicant at successive trophic levels is known as:

  1. Biomagnification
  2. Biotransformation
  3. Biodeterioration
  4. Biogeochemical cycling
Out of syllabusAIPMT 2015
5

The UN Conference of Parties on climate change in the year 2011 was held in :

  1. Peru
  2. Qatar
  3. Poland
  4. South Africa
Out of syllabusAIPMT 2015 (Cancelled)
6

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?

  1. Increased liver cancer
  2. Increased skin cancer
  3. Damage to eyes
  4. Reduced Immune System
Out of syllabusAIPMT 2015 (Cancelled)
7

High value of BOD (Biochemical Oxygen Demand) indicates that :

  1. water is highly polluted
  2. consumption of organic matter in the water is higher by the microbes
  3. water is pure
  4. water is less polluted
Out of syllabusAIPMT 2015 (Cancelled)
8

Rachel Carson's famous book "Silent Spring" is related to:

  1. Population explosion
  2. Pesticide pollution
  3. Ecosystem management
  4. Noise pollution
Out of syllabusAIPMT 2015 (Cancelled)
9

The zone of atmosphere in which the ozone layer is present is called :

  1. Mesosphere
  2. Stratosphere
  3. Ionosphere
  4. Troposphere
Out of syllabusAIPMT 2014
10

A scrubber in the exhaust of a chemical industrial plant removes :

  1. particulate matter of the size 5 micrometer or above
  2. particulate matter of the size 2.5 micrometer or less
  3. gases like ozone and methane
  4. gases like sulphur dioxide
Out of syllabusAIPMT 2014
11

Kyoto-Protocol was endorsed at :

  1. CoP-6
  2. CoP-4
  3. CoP-3
  4. CoP-5
Out of syllabusNEET 2013

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