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CHEMISTRY MCQs

Total Questions : 2589 | Page 55 of 259 pages
Question 541. Threshold limit value of copper in the atmospheric air is
  1.    0.001 mg/m3
  2.    0.01 mg/m3
  3.    1.0 mg/m3
  4.    5.0 mg/m3
 Discuss Question
Answer: Option C. -> 1.0 mg/m3
Question 542. Which of the following is ozone depleting pesticide ?
  1.    D.D.T.
  2.    Benzene
  3.    Methyl bromide
  4.    Ethylene ozonide
 Discuss Question
Answer: Option C. -> Methyl bromide
Question 543. Removal of carbon particles from air involves the principle of
  1.    Precipitation
  2.    Filteration
  3.    Electrophoresis
  4.    Sedimentation
 Discuss Question
Answer: Option C. -> Electrophoresis
Question 544. Physico-chemical characteristics of water in water sources undergo changes due to
  1.    Aquatic macrophytes
  2.    Auatic fungi
  3.    Effluents
  4.    Evapotranspiration
 Discuss Question
Answer: Option C. -> Effluents
Question 545. Coating of solid waste with impervious material is known as
  1.    Encapsulation
  2.    Chemical fixation
  3.    Landfill
  4.    Capping
 Discuss Question
Answer: Option A. -> Encapsulation
Question 546. Sulphur dioxide present in the industrial chimney exhaust causes
  1.    Respiratory and lung disease
  2.    Reduction in plant's productivity owing to acid rain
  3.    Corrosion building materials
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 547. Taj Mahal is greatly affected due to :
  1.    Tourists
  2.    Acid rain
  3.    Deforestation
  4.    Sound pollution
 Discuss Question
Answer: Option B. -> Acid rain
Question 548. High concentration hydrocarbon pollutants in atmospheric air causes
  1.    Cancer
  2.    Silicosis
  3.    Respiratory diseases (e.g.asthma)
  4.    Reduced crop yield
 Discuss Question
Answer: Option A. -> Cancer
Question 549. Which one is not a primary greenhouse gases in the Earth's atmosphere?
  1.    Carbon dioxide
  2.    Methane
  3.    Nitrogen
  4.    Ozone
 Discuss Question
Answer: Option C. -> Nitrogen
Question 550. Sullage water is –
  1.    Waste water released from kitchen
  2.    Waste water released from toilets
  3.    Waste water released from factories
  4.    Waste water released from hospitals
 Discuss Question
Answer: Option A. -> Waste water released from kitchen

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