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: