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Environmental Issues · Question 38

AIPMT 2014MCQEasy📈 Topic in 38% papers+4−1
1

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

Answer

(4) gases like sulphur dioxide

Solution

As per NCERT, a scrubber can remove gases like sulphur dioxide; in a scrubber, the exhaust is passed through a spray of water or lime.

⇒ Water dissolves gases and lime reacts with sulphur dioxide to form a precipitate of sulphate and sulphite.

⇒ Particulate matter is removed by an electrostatic precipitator, not by a scrubber.

∴ A scrubber removes gases like sulphur dioxide.

Answer: (4)

Out of syllabusAIPMT 2014

Keep practising — Environmental Issues

2

Kyoto-Protocol was endorsed at :

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

Global warming can be controlled by :

  1. Increasing deforestation, slowing down the growth of human population
  2. Reducing deforestation, cutting down use of fossil fuel
  3. Increasing deforestation, reducing efficiency of energy usage
  4. Reducing reforestation, increasing the use of fossil fuel
Out of syllabusNEET 2013
4

The Air (Prevention and Control of Pollution) Act came into force in :

  1. 1985
  2. 1981
  3. 1990
  4. 1975
Out of syllabusNEET 2013
5

The second commitment period for Kyoto Protocol was decided at :

  1. Doha
  2. Cancun
  3. Durban
  4. Bali
Out of syllabusNEET 2013 (Karnataka)
6

Climate of the world is threatened by :

  1. Decreasing amount of atmospheric carbon dioxide
  2. Increasing concentration of atmospheric oxygen
  3. Decreasing amount of atmospheric oxygen
  4. Increasing amount of atmospheric carbon dioxide
Out of syllabusNEET 2013 (Karnataka)
7

Which one of the following is not correct as regards the harmful effects of particulate matter of the size 2.5 micrometers or less?

  1. It can directly enter into our circulatory system
  2. It can be inhaled into the lungs
  3. It can cause respiratory problems
  4. It can cause inflammation and damage to the lungs
Out of syllabusNEET 2013 (Karnataka)
8

In an area where DDT had been used extensively, the population of birds declined significantly because :

  1. Earthworms in the area got eradicated
  2. Cobras were feeding exclusively on birds
  3. Birds stopped laying eggs
  4. Many of the birds' eggs laid did not hatch
Out of syllabusAIPMT 2012 (Prelims)
9

Which one of the following is a wrong statement?

  1. Most of the forests have been lost in tropical areas
  2. Greenhouse effect is a natural phenomenon
  3. Ozone in upper part of atmosphere is harmful to animals
  4. Eutrophication is a natural phenomenon in freshwater bodies
Out of syllabusAIPMT 2012 (Prelims)
10

Measuring biochemical oxygen demand (BOD) is a method used for

  1. Working out the efficiency of oil driven automobile engines
  2. Estimating the amount of organic matter in sewage water
  3. Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale
  4. Working out the efficiency of R.B.Cs. about their capacity to carry oxygen
Out of syllabusAIPMT 2012 (Prelims)
11

"Good ozone" is found in the

  1. Troposphere
  2. Ionosphere
  3. Stratosphere
  4. Mesosphere
Out of syllabusAIPMT 2011 (Mains)

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