PYQSide ExamsMy practice

Environmental Issues · Question 79

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

Fluoride pollution mainly affects :-

  1. Heart
  2. Kidney
  3. Brain
  4. Teeth

Answer

(4) Teeth

Solution

Excess fluoride in drinking water (above about 1.5 ppm) causes fluorosis.

⇒ The first and most visible effect is dental fluorosis: mottling, brown stains and pitting of the enamel of the teeth.

∵ Very high intake over long periods also hardens bones (skeletal fluorosis), but the teeth are mainly affected.

∴ Fluoride pollution mainly affects the teeth.

Answer: (4)

Out of syllabusAIPMT 2003

Keep practising — Environmental Issues

2

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
3

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
4

Maximum greenhouse gas is released by which country?

  1. France
  2. Britain
  3. India
  4. U.S.A.
Out of syllabusAIPMT 2002
5

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
6

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

All Environmental Issues PYQs →

PDFDownload Environmental Issues PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Botany chapters
Class 11The Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisionTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and Development
Class 12Reproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental Issues
Other chaptersBiomolecules (Biology)