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Environmental Issues · Question 80

AIPMT 2003MCQEasy📈 Topic in 12% papers+4−1
1

Escherichia coli is used as an indicator organism to determine pollution of water with :-

  1. Faecal matter
  2. Pollen of aquatic plants
  3. Heavy metals
  4. Industrial effluents

Answer

(1) Faecal matter

Solution

Escherichia coli is a normal inhabitant of the human (and animal) large intestine and is passed out in faeces.

⇒ Its presence (coliform count) in a water sample shows that the water has been contaminated with sewage, i.e. faecal matter.

∴ E. coli is the indicator organism for faecal pollution of water.

Answer: (1)

Out of syllabusAIPMT 2003

Keep practising — Environmental Issues

2

Which of the following is absent in polluted water?

  1. Larva of stone fly
  2. Hydrilla
  3. Blue-green algae
  4. Water hyacinth
Out of syllabusAIPMT 2002
3

Maximum greenhouse gas is released by which country?

  1. France
  2. Britain
  3. India
  4. U.S.A.
Out of syllabusAIPMT 2002
4

What is the intensity of sound in normal conversation?

  1. 30–60 dB
  2. 10–20 dB
  3. 120–150 dB
  4. 70–90 dB
Out of syllabusAIPMT 2001
5

Which is the cause of the damage expressed as relative biological effectiveness?

  1. Low temperature
  2. High temperature
  3. Radiation
  4. Pollution
Out of syllabusAIPMT 2000

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