Important Questions of Environmental Chemistry Chemistry | Zigya

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61.

The noble gas that does NOT occur in the atmosphere is :

  • Ne

  • He

  • Kr

  • Ra


62.

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

  • Ozone

  • Acrolein

  • Peroxyacetyl nitrate

  • Peroxyacetyl nitrate

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63.

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

  • Carbon monoxide does not play any role in photochemical smog formation

  • Photochemical smog is an oxidising agent in character

  • Photochemical smog is formed through photochemical reaction involving solar energy

  • Photochemical smog is formed through photochemical reaction involving solar energy

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64.

Green chemistry means such reactions which 

  • produce colour during reactions

  • reduce the use and production of hazardous chemicals

  • are related to the depletion of the ozone layer

  • are related to the depletion of the ozone layer

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65.

Which of the following is a sink for CO?

  • Haemoglobin

  • Micro-organisms present in the soil

  • Oceans

  • Oceans

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66.

Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity?

  • N2O5

  • NO2

  • NO

  • N2O


67.

Which of the following region is coldest?

  • Stratosphere

  • Troposphere

  • Mesosphere

  • Thermosphere


68.

Which of the following statement(s) is not correct?

  • Suspended particulate matter is an important pollutant released by diesel vehicles

  • Soot particles (size < 5μ) cause fibrosis of the lung living

  • H2SO4 particulates have size of 500- 1000 nm

  • Photochemical smog is formed by oxides of sulphur, smoke and dust particles


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69.

Green chemistry means such reactions which

  • produce colour during reactions

  • reduce the use and production of hazardous chemicals

  • are related to the depletion of ozone layer

  • study the reactions in plants


70.

Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

  • Ca(OCl)2

  • CaO2Cl

  • CaCl2

  • CaOCl2


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