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Environmental Issues · Question 47

AIPMT 2012 (Prelims)MCQEasy📈 Topic in 12% papers+4−1
1

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

Answer

(2) Estimating the amount of organic matter in sewage water

Solution

As per NCERT, BOD is the amount of oxygen that would be consumed if all the organic matter in one litre of water were oxidised by bacteria.

The greater the BOD of waste water, the more is its polluting potential, i.e., BOD is a measure of the organic matter present in sewage water.

Answer: (2)

Out of syllabusAIPMT 2012 (Prelims)

Keep practising — Environmental Issues

2

"Good ozone" is found in the

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

Eutrophication is often seen in :

  1. Ocean
  2. Mountains
  3. Deserts
  4. Fresh water lakes
Out of syllabusAIPMT 2011 (Prelims)
4

Which one of the following pairs of gases is the major cause of "greenhouse effect"?

  1. CFCs and SO2
  2. CO2 and CO
  3. CO2 and N2O
  4. CO2 and O3
Out of syllabusAIPMT 2011 (Prelims)
5

Which one of the following statements is wrong in case of Bhopal tragedy?

  1. Thousands of human beings died
  2. It took place in the night of December 2/3, 1984
  3. Radioactive fallout engulfed Bhopal
  4. Methyl isocyanate gas leakage took place
Out of syllabusAIPMT 2011 (Prelims)
6

Which one of the following is the correct expanded form of the given acronym?

  1. IPCC = International Panel for Climate Change
  2. EPA = Environmental Pollution Agency
  3. UNEP = United Nations Environmental policy
  4. IUCN = International Union for Conservation of Nature and Natural Resources
Out of syllabusAIPMT 2011 (Prelims)
7

When domestic sewage mixes with river water

  1. The river water is still suitable for drinking as impurities are only about 0.1%
  2. Small animals like rats will die after drinking river water
  3. The increased microbial activity releases micro-nutrients such as iron
  4. The increased microbial activity uses up dissolved oxygen
Out of syllabusAIPMT 2010 (Mains)
8

A renewable exhaustible natural resource is –

  1. Forest
  2. Minerals
  3. Coal
  4. Petroleum
Out of syllabusAIPMT 2010 (Prelims)
9

dB is a standard abbreviation used for the quantitative expression of –

  1. the dominant Bacillus in a culture
  2. the density of bacteria in a medium
  3. a certain pesticide
  4. a particular pollutant
Out of syllabusAIPMT 2010 (Prelims)
10

The two gases making highest relative contribution to the greenhouse gases are –

  1. CFCs and N2O
  2. CO2 and N2O
  3. CO2 and CH4
  4. CH4 and N2O
Out of syllabusAIPMT 2010 (Prelims)
11

Global agreement in specific control strategies to reduce the release of ozone depleting substances, was adopted by :

  1. The Montreal Protocol
  2. The Kyoto Protocol
  3. The Vienna Convention
  4. Rio de Janeiro Conference
Out of syllabusAIPMT 2009

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