Consider the following statements:
1. DDT
2. Salts of heavy metals
3. Radioactive substances
Which of these pollutants is/are non-biodegradable?
Consider the following statements about the carbon monoxide:
1. It lowers the amount of oxygen that enters our blood
2. It is produced from the combustion of natural and synthetic products which gives it a light black colour.
Which of these statements is/are correct?
1 Crore+ students have signed up on EduRev. Have you? Download the App |
Consider the following statements about the Ozone:
1. It releases mainly from air-conditioning systems and refrigeration.
2. Vehicles and industries are the major source of ground-level ozone emissions.
Which of these statements is/are correct?
Consider the following statements regarding the formation of smog:
1. Photochemical smog is a term used to describe air pollution that is a result of the interaction of sunlight with certain chemicals in the atmosphere.
2. Ground-level ozone is formed when vehicle emissions contain nitrogen oxides and volatile organic compounds.
Which of these statements is/are correct?
Q. Which of the following is/are advantages of fly ash?
1.Fly ash bricks are light in weight and offer high strength and durability.
2.Fly ash is a better fill material for road embankments and in concrete roads.
3.Fly ash can be used in reclamation of wastelands.
Which of these statements is/are correct?
Which of these are correctly matched?
1. Arresters - These are used to separate particulate matters from contaminated air
2. Scrubbers - These are used to clean air for both dusts and gases by passing it through a dry or wet packing material
Which of these statements is/are correct:
Consider the following statements:
1. Biocides, polychlorinated biphenyls (PCBs) and heavy metals directly eliminate sensitive aquatic organisms.
2. Hot waters discharged from industries, when added to water bodies, lowers its DO content.
Which of these statements is/are not correct?
Consider the following statements:
1. Water pollution by organic wastes is measured in terms of Biochemical Oxygen Demand (BOD).
2. BOD is the amount of dissolved oxygen needed by bacteria in decomposing the organic wastes present in water.
3. It is expressed in milligrams of oxygen per litre of water.
Which of these statements is/are correct?
Which of the following are the effects of soil pollution on agriculture:
1. Increased salinity.
2. Loss of soil and nutrients.
3. Increased nitrogen fixation.
Which of these statements is/are correct?
Consider the following statements:
1. Alpha particles can be blocked by a piece of paper and human skin.
2. Beta particles can penetrate through the skin, while can be blocked by some pieces of glass and metal.
3. Gamma rays can penetrate easily to human skin and damage cells on its way through, reaching far, and can only be blocked by a very thick, strong, massive piece of concrete.
Which of these statements is/are correct?
552 videos|1113 docs|424 tests
|
552 videos|1113 docs|424 tests
|