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Environmental Issues · Question 76

AIPMT 2004MCQEasy📈 Topic in 38% papers+4−1
1

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

Answer

(2) Reacted with water

Solution

In December 1984, water entered tank E-610 of methyl isocyanate (MIC, CH3-N=C=O) at the Union Carbide pesticide plant in Bhopal.

⇒ MIC reacted exothermically with water:

CH3NCO + H2O CH3NH2 + CO2

⇒ The heat raised the temperature and pressure in the tank, and a large cloud of toxic MIC gas escaped into the air.

∴ The tragedy took place because methyl isocyanate reacted with water.

Answer: (2)

Out of syllabusAIPMT 2004

Keep practising — Environmental Issues

2

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
3

Common indicator organism of water pollution is :-

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

Fluoride pollution mainly affects :-

  1. Heart
  2. Kidney
  3. Brain
  4. Teeth
Out of syllabusAIPMT 2003
5

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 syllabusAIPMT 2003
6

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
7

Maximum greenhouse gas is released by which country?

  1. France
  2. Britain
  3. India
  4. U.S.A.
Out of syllabusAIPMT 2002
8

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
9

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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