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Environmental Issues: Class-XII


Previous Year Questions (PYQs)

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NEET PYQs on Environmental Issues: Class-XII


Montreal protocol was signed in 1987 for control of:

NEET-(Sept)2020 [Environmental-Issues] [class-xii ]

  • Transport of Genetically modified organisms from one country to another
  • Emission of ozone depleting substances
  • Release of Green House gases
  • Disposal of e-wastes
  • Correct Option: B  [ Emission of ozone depleting substances ]

    Remark:

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder causing wheezing due to:

NEET-2019 [Environmental-Issues] [class-xii ]

  • benign growth on mucous lining of nasal cavity.
  • proliferation of fibrous tissues and damage of the
  • inflammation of bronchi and bronchioles.
  • reduction in the secretion of surfactants by pneumocytes.
  • Correct Option: C  [ inflammation of bronchi and bronchioles. ]

    Remark:

Which of the following protocols did aim for reducing emission of chloroflurocarbons into the atmosphere?

NEET-2019 [Environmental-Issues] [class-xii ]

  • Geneva Protocol
  • Gothenburg Protocol
  • Kyoto protocol
  • Montreal protocol
  • Correct Option: D  [ Montreal protocol ]

    Remark:

Which one of the following equipments is essentially required for growing microbes on a large scale, for industrial production of enzymes?

NEET-2019 [Environmental-Issues] [class-xii ]

  • BOD incubator
  • Bioreactor
  • Sludge digester
  • Industrial oven
  • Correct Option: B  [ Bioreactor ]

    Remark:

Which of these following methods is the most suitable for disposal of nuclear waste?

NEET-2019 [Environmental-Issues] [class-xii ]

  • Burry the waste within rocks deep below the Earth's surface
  • Dump the waste within rocks under deep ocean
  • Bury the waste under Antarctic ice-cover
  • Shoot the waste into space
  • Correct Option: A  [ Burry the waste within rocks deep below the Earth's surface ]

    Remark:

Which of the following pairs of gases is mainly responsible for green house effect?

NEET-2019 [Environmental-Issues] [class-xii ]

  • Carbon dioxide and Methane
  • Nitrogen and Sulphur dioxide
  • Oxygen and Nitrogen
  • Ozone and Ammonia
  • Correct Option: A  [ Carbon dioxide and Methane ]

    Remark:

Polyblend, a fine powder of recycled modified plastic, has proved to be a good material for:

NEET-2019 [Environmental-Issues] [class-xii ]

  • making tubes and pipes
  • construction of roads
  • use as a fertilizer
  • making plastic sacks
  • Correct Option: B  [ construction of roads ]

    Remark: