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Environmental Issues · Question 20

NEET 2017MCQEasy📈 Topic in 38% papers+4−1
1

Which one of the following statements is not valid for aerosols ?

  1. They alter rainfall and monsoon patterns
  2. They have negative impact on agricultural land
  3. They cause increased agricultural productivity
  4. They are harmful to human health

Answer

(3) They cause increased agricultural productivity

Solution

Aerosols are fine solid or liquid particles suspended in the air (smoke, dust, mist, fumes).

They scatter and absorb sunlight and act as nuclei for cloud formation they alter rainfall and monsoon patterns.

They settle on leaves and soil and reduce the sunlight reaching crops negative impact on agricultural land.

As per NCERT, fine particulate matter can be inhaled deep into the lungs and causes breathing and respiratory problems harmful to human health.

Aerosols do not increase agricultural productivity; statement (3) is not valid.

Answer: (3)

Out of syllabusNEET 2017

Keep practising — Environmental Issues

2

A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called -

  1. Shifting agriculture
  2. Strip farming
  3. Ley farming
  4. Contour farming
Out of syllabusNEET 2016 (Phase 1)
3

Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers

  1. Methane
  2. Ozone
  3. Nitrous oxide
  4. Ammonia
Out of syllabusNEET 2016 (Phase 1)
4

Joint Forest Management Concept was introduced in India during :

  1. 1990s
  2. 1970s
  3. 1960s
  4. 1980s
Out of syllabusNEET 2016 (Phase 1)
5

A river with an inflow of domestic sewage rich in organic waste may result in -

  1. Death of fish due to lack of oxygen
  2. Increased population of aquatic food web organisms
  3. Drying of the river very soon due to algal bloom
  4. An increased production of fish due to biodegradable nutrients
Out of syllabusNEET 2016 (Phase 1)
6

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

  1. petroleum industry
  2. sugar industry
  3. domestic sewage
  4. dairy industry
Out of syllabusNEET 2016 (Phase 2)
7

A lake which is rich in organic waste may result in

  1. mortality of fish due to lack of oxygen
  2. increased population of fish due to lots of nutrients
  3. increased population of aquatic organisms due to minerals
  4. drying of the lake due to algal bloom
Out of syllabusNEET 2016 (Phase 2)
8

The highest DDT concentration in aquatic food chain shall occur in

  1. crab
  2. Phytoplankton
  3. eel
  4. seagull
Out of syllabusNEET 2016 (Phase 2)
9

Acid rain is caused by increase in the atmospheric concentration of -

  1. SO3 and CO
  2. CO2 and CO
  3. O3 and dust
  4. SO2 and NO2
Out of syllabusAIPMT 2015
10

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

  1. light
  2. food
  3. essential minerals
  4. oxygen
Out of syllabusAIPMT 2015
11

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

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