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7 questions · timed · auto-graded

Question 12 Marks
What caused the Bhopal gas tragedy?
Answer
This was the worst industrial accident on December 3, 1984, when about 40 tons of methyl isocyanate (MIC) leaked into the atmosphere from Union Carbides pesticide factory in Bhopal in Madhya Pradesh.
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Question 22 Marks
In what way does soil pollution affect human beings?
Answer
Human beings are affected through food chains e.g. Nitrogenous fertilizers produce toxic concentration of nitrate and nitrite in the leaves through soil, pollution of soil by underground water polluted by industrial wastes. Eutrophication causes pollution of water and soil making it infertile and unsuitable for plant growth.
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Question 32 Marks
What were the after-effects of the Bhopal gas tragedy?
Answer
The tragic after-effects were blinding people, choking their breathing and suffocating them, damaged the eyes, lungs, and nervous system, upset the urine system and loss of unborn babies, different plant species were also damaged.
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Question 42 Marks
What caused the Chernobyl disaster?
Answer
This was a radioactive accident in 1986 in Chernobyl in Ukraine on April 26. When a reactor of the nuclear power complex at Chernobyl exploded. A massive steam explosion, the core of the reactor combined with water to produce hydrogen exploded blowing toxic radioactive gases into the air.
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Question 52 Marks
What was the immediate and long term effects of the leakage of MIC gas from the Union Carbide’s pesticide factory in Bhopal?
Answer
This accident killed 3500 people and 40,000 people were affected in an area of 100 sq. km. Gas leakage did the people blind, loss of body control, loss of unborn babies, damage to brain, kidney, lungs, intestinal diseases, damaging the reproductive ability and plant species
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Question 62 Marks
Explain the effects of soil pollution on human beings and environment.
Answer
Soil pollution causes contamination of plants which may affect the human health and the scarcity of oxygen disturbs the natural composition of air and air pollution promotes unwanted diseases.
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Question 72 Marks
Explain how the accumulation of nutrients and chemicals in the water proves fatal for marine organisms.
Answer
Eutrophication causes in growth of phytoplankton and algae which reduce the penetration of oxygen, light and heat into the water bodies, so, the marine organisms suffer greatly and mostly die.
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[2 Mark Question Answer] - Geography STD 9 Questions - Vidyadip