Pollution of Air and Water - Chapter Wise CBSE Solved Question and Answer Based On NCERT
Very Short Q&A:
Q1: Which of the following is not a greenhouse gas
Sulphur dioxide
Carbon dioxide
Nitrogen
Methane
View Answer
Ans:
Nitrogen
Q2: Air contains _______ nitrogen
78%
21%
0.03%
None of this.
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Ans:
78%
Q3: Name some air pollutants.
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Ans:
Smoke, dust, gases like carbon monoxide, carbon dioxide, nitrogen oxides and smoke.
Q4: How carbon monoxide is produced?
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Ans:
Carbon monoxide is produced from incomplete burning of fuels like petrol and diesel.
Q5: Carbon monoxide reduces oxygen carrying capacity of ___________.
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Ans:
Blood
Q6: What is the full form of CFC?
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Ans:
Chlorofluorocarbon
Q7: What is the effect of pollution on Taj Mahal?
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Ans:
Marble of Taj Mahal is getting discoloured because of the pollutants in air.
Q8: Define greenhouse effect.
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Ans:
The greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere like water vapour, carbon dioxide, nitrous oxide, and methane, trap energy from the sun. Without these gases, heat would escape back into space and Earth�s average temperature would be about 60�F colder. Because of how they warm our world, these gases are referred to as greenhouse gases.
Q9: Does acid rain affect soil and crops also?
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Ans:
Yes
Q10: Name some cleaner fuels.
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Ans:
CNG, LPG, unleaded petrol etc.
Q11: What is the full form of CNG and LPG?
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Ans:
CNG stands for Compressed Natural Gas, and LPG stands for Liquefied Petroleum Gas.
Q12: __________________ leads to increase in amount of CO2 in the atmosphere.
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Ans:
Deforestation
Q13: Name some greenhouse gases.
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Ans:
Methane, carbon dioxide, nitrous oxide and water vapour.
Q14: Name some water pollutants.
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Ans:
Sewage, toxic chemicals, silts etc.
Q15: Name an ambitious plan to save the Ganga River.
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Ans:
Ganga Action Plan.
Q16: Pesticides and _______________________ seep into the ground to pollute ground water.
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Ans:
Weedicides
Q17: In which year Ganga Action Plan was launched?
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Ans:
1985
Q18: What is the aim of Ganga Action Plan?
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Ans:
To save rivers by reducing pollution levels in the river.
Q19: What is potable water?
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Ans:
Water which is suitable for drinking is called potable water.
Q20: __________________ is the method of obtaining safe drinking water.
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Ans:
Chlorination
Q21: Boiling kills germs present in water. True/False.
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Ans:
True
Q22: What is chlorination?
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Ans:
Chlorination is the chemical method for purifying water, by adding chlorine tablets or bleaching powder to the water.
Q23: Name the three R principles to save water and not waste it.
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Ans:
Reduce, reuse and recycle.
Q24: What is Van Mahotsav?
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Ans:
Van Mahotsav is an annual pan-Indian tree planting festival, occupying a week in the month of July, during this week lakhs of trees are planted.
Q25: What is a compost pit?
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Ans:
Compost pit is a hole in ground in which organic wastes are deposited and covered with soil. It is the cheap and good for disposing of a one-time large load of waste. It allows you to improve the soil structure and fertility in a future garden bed.
Q26: Gangotri glacier in the Himalayas has started melting because of __________________.
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Ans:
Global warming.
Q27: Name the air pollutants released by vehicles.
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Ans:
Carbon monoxide, carbon dioxide, nitrogen oxides and smoke.
Q28: What is smog?
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Ans:
Smog is the fog like layer in the atmosphere which is made up of smoke and fog.
Q29: What are the harmful effects of smog?
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Ans:
The smog causes breathing difficulties like asthma, cough and wheezing in human beings.
Q30: State the composition of gases in air.
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Ans:
Q31: Which water is fit for drinking?
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Ans:
Potable water which is free from all kinds of germs and harmful chemicals.
Q32: Name the gas responsible for global warming.
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Ans:
Carbon dioxide.
Q33: Water is ___________________, we must conserve it.
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Ans:
Precious
Q34: How chlorination is done to purify water?
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Ans:
By adding chlorine tablets or bleaching powder.
Q35: The bacteria present in the faeces of mammals are indicator of _____________________.
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Ans:
Quality of water.
Q36: What do you mean by water pollutants?
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Ans:
The substances that pollute water are called water pollutants.
