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NEET Practice Questions (MCQs) with Answers & Solutions

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UV rays are highly injurious to living organisms

A. Because DNA and Protein preferentially refract UV light B. Because DNA and Protein preferentially radiate UV light in the form of heat energy C. Because DNA and Protein preferentially absorb UV light and as a result chemical bonds are broken D. Both B and C

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Explanation

Page number 282

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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The thickness of Ozone is measured in

A. Db B. DU C. DS D. Dm

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Explanation

Page number 282

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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In stratosphere

Find the wrong one out

A. Ozone is formed by the action of UV rays on molecular Oxygen B. Ozone is degraded there C. There is a balance between formation and degradation of ozone D. There will be accumulation of Chlorofluorocarbons or CFCs which are acted upon by UV rays and protects the ozone layer.

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Explanation

Page number 282

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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CFCs

Find the wrong one out.

A. Release Cl atoms in stratosphere B. Used as refrigerant C. Cl of CFCs degrade ozone releasing molecular oxygen D. Cl atoms released out of CFCs are also used up during degradation of Ozone

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Explanation

Page number 282

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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Over Antarctica region, the ozone hole is

A. Due to no formation of Ozone B. Due to high formation and low degradation of ozone C. Due to low formation and high degradation of ozone D. Due to no degradation of ozone

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Explanation

Page number 282- 283

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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UV-B

A. Damages DNA and causes mutation B. Ageing of skin and damage to the skin cells and cause various types of skin cancer C. Inflammation of cornea, cataract D. All of these

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Explanation

Page number 283

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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Snow Blindness and cataract is caused by

A. UV-A B. UV-B C. UV-C D. All of these

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Explanation

Page number 283

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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Montreal Protocol

Find the wrong information about it.

A. An International Treaty B. Was signed at Montreal (canada) C. To control the emission of Ozone depleting substances D. Was effective in 1987

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Explanation

Page number 283

16.7 Ozone Depletion In The Stratosphere

Environmental Issues

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Soil Erosion and desertification least likely resulted in which of the following cases?

A. Over Cultivation B. Unrestricted Grazing C. Deforestation, Poor Irrigation Practices D. Proper resource Utilization and Maintenance

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Explanation

Page number 283

16.8 Degradation By Improper Resource Utilization And Maintenance

Environmental Issues

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Which of the following have come into wake of the green revolution?

A. Organic Farming B. Water logging C. Soil salinity D. All of these

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Explanation

Page number 283

16.8 Degradation By Improper Resource Utilization And Maintenance

Environmental Issues

16.4 and 16.4.1

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