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Biology
Environmental Issues
94 questions from 32 papers, each with its answer.
- 94 questions
- 32 papers
- 2.67% of Biology
Ozone depletion – World Ozone Day
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World Ozone Day is celebrated on
Ozone Day (16 Sept) marks the Montreal Protocol.
World Ozone Day is celebrated on 16th September. 5th June – World Environment Day; 22nd April – Earth Day; 21st April – National Yellow Bat Day.
Air pollution – primary and secondary pollutants
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Which of the following is a secondary pollutant?
Ground-level ozone forms from reactions of primary pollutants.
$O_3$ (ozone) is a secondary pollutant. Secondary pollutants are formed by the reaction of primary pollutants. CO – quantitative pollutant; $CO_2$ – primary pollutant; $SO_2$ – primary pollutant.
Ozone depletion by CFCs
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In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?
Cl atoms from CFCs catalytically destroy ozone.
UV rays act on CFCs, releasing Cl atoms; chlorine reacts with ozone in a sequential (catalytic) manner, converting it into oxygen. Carbon, oxygen and Fe are not related to ozone layer depletion.
Pollution, ozone depletion and deforestation
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Match the items given in Column I with those in Column II and select the correct option given below:
Pick the matching item from Column II for each row.
Column I
- a. Eutrophication
- b. Sanitary landfill
- c. Snow blindness
- d. Jhum cultivation
Column II
- i. UV-B radiation
- ii. Deforestation
- iii. Nutrient enrichment
- iv. Waste disposal
Correct answer: a → iii, b → iv, c → i, d → ii
Eutrophication, landfill, snow blindness and jhum map to nutrients, waste, UV-B and deforestation.
Eutrophication – nutrient enrichment Sanitary landfill – waste disposal Snow blindness – UV-B radiation Jhum cultivation – deforestation Correct match: a-iii, b-iv, c-i, d-ii.
That is every question in Environmental Issues for this filter.
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