Environmental Issues

Dobson units are used to measure thickness of :

1. Troposphere
2. CFCs
3. Stratosphere
4. Ozone

Snow-blindness in Antarctic region is due to

1. High reflection of light from snow
2. Freezing of fluids in the eye by low temperature
3. Inflammation of cornea due to high dose of UV-B radiation
4. Damage to retina caused by infra-red rays

Montreal protocol was signed in 1987 for control of

1. Disposal of e-wastes
2. Transport of Genetically modified organisms from one country to another
3. Emission of ozone depleting substances
4. Release of Green House gases

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

1. Gothenburg Protocol
2. Geneva Protocol
3. Montreal Protocol
4. Kyoto Protocol

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

1. Construction of roads
2. Making tubes and pipes
3. Making plastic sacks
4. use as a fertilizer

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

1. Nitrogen and Sulphur dioxide
2. Carbon dioxide and Methane
3. Ozone and Ammonia
4. Oxygen and Nitrogen

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

1. Dump the waste within rocks under deep ocean
2. Bury the waste within rocks deep below the Earth’s surface
3. Shoot the waste into space
4. Bury the waste under Antarctic ice-cover

In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?

1. Carbon
2. Cl
3. Fe
4. Oxygen

Which of the following is a secondary pollutant?

1. CO
2. CO2
3. SO2
4. O3

World Ozone Day is celebrated on

1. 5th June
2. 21st April
3. 16th September
4. 22nd April