PYQSide ExamsMy practice

Environmental Chemistry · Question 8

NEET 2017MCQMedium📈 Topic in 25% papers+4−1
1

Which of the following is a sink for CO?

  1. Microorganisms present in the soil
  2. Oceans
  3. Plants
  4. Haemoglobin

Answer

(1) Microorganisms present in the soil

Solution

A sink is a natural medium that removes a pollutant from the atmosphere.

Microorganisms present in the soil (certain bacteria and fungi) take up carbon monoxide and oxidise it to CO2, so the soil is the major natural sink for CO.

Oceans and plants are sinks for CO2, not for CO; haemoglobin binds CO in the body (forming carboxyhaemoglobin), which is its toxic effect, not an atmospheric sink.

Answer: (1)

Out of syllabusNEET 2017

Keep practising — Environmental Chemistry

2

Which one of the following is not a common component of Photochemical smog?

  1. Ozone
  2. Acrolein
  3. Peroxyacetyl nitrate
  4. Chlorofluorocarbons
Out of syllabusAIPMT 2014
3

Which one of the following statements is not true?

  1. Clean water would have a BOD value of 5 ppm.
  2. Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration up to 1 ppm.
  3. When the pH of rain water is higher than 6.5, it is called acid rain.
  4. Dissolved Oxygen (DO) in cold water can reach a concentration up to 10 ppm.
Out of syllabusNEET 2013 (Karnataka)
4

Which one of the following statements regarding photochemical smog is not correct?

  1. Carbon monoxide does not play any role in photochemical smog formation.
  2. Photochemical smog is an oxidising agent in character.
  3. Photochemical smog is formed through photochemical reaction involving solar energy.
  4. Photochemical smog does not cause irritation in eyes and throat.
Out of syllabusAIPMT 2012 (Prelims)
5

Which one of the following statements is not true?

  1. pH of drinking water should be between 5.5–9.5.
  2. Concentration of DO below 6 ppm is good for the growth of fish.
  3. Clean water would have a BOD value of less than 5 ppm.
  4. Oxides of sulphur, nitrogen and carbon are the most widespread air pollutants.
Out of syllabusAIPMT 2011 (Prelims)
6

Green chemistry means such reactions which

  1. are related to the depletion of ozone layer
  2. study the reactions in plants
  3. produce colour during reactions
  4. reduce the use and production of hazardous chemicals
Out of syllabusAIPMT 2008

All Environmental Chemistry PYQs →

PDFDownload Environmental Chemistry PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolid StateSolutionsElectrochemistryChemical KineticsSurface Chemistry
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular StructureHydrogens-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPolymersChemistry in Everyday LifePrinciples Related to Practical Chemistry