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Environmental Issues · Question 69

AIPMT 2006MCQMedium📈 Topic in 12% papers+4−1
1

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is -

  1. <30 ppm
  2. <3.0 ppm
  3. <100 ppm
  4. <10 ppm

Answer

(1) <30 ppm

Solution

BOD is the amount of oxygen needed by microorganisms to decompose the organic matter in one litre of water.

⇒ The Central Pollution Control Board permits waste water to be discharged into inland surface waters only when its BOD is below 30 mg L-1.

∵ 1 mg L-1 = 1 ppm

∴ The prescribed limit is <30 ppm.

Answer: (1)

Out of syllabusAIPMT 2006

Keep practising — Environmental Issues

2

Photochemical smog pollution does not contain-

  1. Nitrogen dioxide
  2. PAN (peroxy acyl nitrate)
  3. Ozone
  4. Carbon dioxide
Out of syllabusAIPMT 2006
3

Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year-

  1. 1988
  2. 1986
  3. 1985
  4. 1987
Out of syllabusAIPMT 2006
4

Prolonged liberal irrigation of agricultural fields is likely to create the problem of -

  1. Salinity
  2. Acidity
  3. Aridity
  4. Metal toxicity
Out of syllabusAIPMT 2005
5

Which of the following is not used for disinfection of drinking water ?

  1. Chloramine
  2. Ozone
  3. Chlorine
  4. Phenyle
Out of syllabusAIPMT 2005
6

Identify the correctly matched pair -

  1. Basel Convention – Biodiversity Conservation
  2. Kyoto Protocol – Climatic change
  3. Ramsar Convention – Ground water pollution
  4. Montreal Protocol – Global warming
Out of syllabusAIPMT 2005
7

Which one of the following pairs is mismatched ?

  1. Fossil fuel burning – release of CO2
  2. Nuclear power – radioactive wastes
  3. Biomass burning – release of CO2
  4. Solar energy – greenhouse effect
Out of syllabusAIPMT 2005
8

In 1984, the Bhopal gas tragedy took place because methyl isocyanate :-

  1. Reacted with DDT
  2. Reacted with water
  3. Reacted with ammonia
  4. Reacted with CO2
Out of syllabusAIPMT 2004
9

Lead concentration in blood is considered alarming if it is -

  1. 4-6 g/100 mL
  2. 30 g/100 mL
  3. 20 g/100 mL
  4. 10 g/100 mL
Out of syllabusAIPMT 2004
10

Common indicator organism of water pollution is :-

  1. Escherichia coli
  2. Lemna paucicostata
  3. Entamoeba histolytica
  4. Eichhornia crassipes
Out of syllabusAIPMT 2004
11

Fluoride pollution mainly affects :-

  1. Heart
  2. Kidney
  3. Brain
  4. Teeth
Out of syllabusAIPMT 2003

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