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Environmental Issues

AIPMT 2004MCQEasy📈 Topic in 12% papers+4−1
Ques. 1AIPMT 2004

Common indicator organism of water pollution is :-

  1. Escherichia coli
  2. Lemna paucicostata
  3. Entamoeba histolytica
  4. Eichhornia crassipes

Answer

(1) Escherichia coli

Solution

Water polluted by sewage contains human faecal matter.

Escherichia coli is a normal inhabitant of the human large intestine and is passed out in very large numbers in faeces, so its presence (coliform count) in water is used as the common indicator of faecal / sewage pollution.

Lemna and Eichhornia are aquatic weeds, and Entamoeba histolytica is a pathogen, not a routine indicator.

∴ The common indicator organism is Escherichia coli.

Answer: (1)

Out of syllabus

Keep practising — Environmental Issues

Ques. 2AIPMT 2003

Fluoride pollution mainly affects :-

  1. Heart
  2. Kidney
  3. Brain
  4. Teeth
Out of syllabus
Ques. 3AIPMT 2003

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
Out of syllabus
Ques. 4AIPMT 2002

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 syllabus
Ques. 5AIPMT 2002

Maximum greenhouse gas is released by which country?

  1. France
  2. Britain
  3. India
  4. U.S.A.
Out of syllabus
Ques. 6AIPMT 2001

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 syllabus
Ques. 7AIPMT 2000

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

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

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