Pollution - Maharashtra Board STD 8 Science Questions

Q 1MCQ1 Mark

Which is the easiest method to identify the polluted water?

A
To taste the water
B
To check the depth of water
✓
To observe colour and odour of the water
D
To swim in the water

Answer: C.

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Q 2MCQ1 Mark

What grows in excess when eutrophication of the water bodies take place?

A
Plants
✓
Algae
C
Fishes
D
Fungi

Answer: B.

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Q 3MCQ1 Mark

What is the type of pollutants that are present in the industrial effluents that is released in the rivers and sea?

✓
Inorganic
B
Organic
C
Biological
D
Biomedical

Answer: A.

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Q 4MCQ1 Mark

Which fertilizers when used in excessive amounts cause soil pollution that spreads to neighbouring water bodies and cause water pollution too?

✓
Chemical
B
Organic
C
Artificial
D
Compost

Answer: A.

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Q 5MCQ1 Mark

Which of the following is seen in the polluted water body?
(1) flowers used in pooja
(2) fruits
(3) fishes
(4) aquatic insects
(5) plastic bags
(6) turtles
(7) thick growth of algae
(8) light blue colour of water
(9) cattle wading in water
(10) broken idols

A
(1) (3) (5) (6) (9) (10)
✓
(1) (2) (5) (7) (9) (10)
C
(1) (3) (6) (8) (9) (10)
D
(1) (2) (4) (7) (8) (9)

Answer: B.

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Q 6Write the following Statement Is True Or False. & Write True Statement.1 Mark

Though any amount of pollutants are added to the soil, the toxic substances do not leach into water.

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Q 7Write the following Statement Is True Or False. & Write True Statement.1 Mark

When water is mixed with natural or artificial unwanted material, the dissolved oxygen level of such water increases.

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Q 8Write the following Statement Is True Or False. & Write True Statement.1 Mark

Polluted water is responsible for diseases such as cholera, hepatitis, typhoid, skin diseases and diseases of the alimentary canal.

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Q 9Write the following Statement Is True Or False. & Write True Statement.1 Mark

More the use of electric appliances, more will be the pollution.

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Q 10Write the following Statement Is True Or False. & Write True Statement.1 Mark

Water does not get polluted by washing the clothes in running water of river.

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Q 11Answer the following in one sentece.1 Mark

Which are visible pollutants known to you?

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Q 12Answer the following in one sentece.1 Mark

What are Pollutants?

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Q 13Answer the following in one sentece.1 Mark

What is pollution?

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Q 14Answer the following in one sentece.1 Mark

People living in the busy squares face the problems like short breathing and other respiratory problems.(write which type of pollution is this)

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Q 15Answer the following in one sentece.1 Mark

Crop does not grow up in some areas.(write which type of pollution is this)

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Q 16Answer the following questions in detail.2 Marks

Define : Soil pollution.

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Q 17Answer the following questions in detail.2 Marks

Define : Water pollution.

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Q 18Answer the following questions in detail.2 Marks

Define : Air pollution.

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Q 19Answer the following questions in detail.2 Marks

Classify the following pollutants into natural and manmade categories.
Sewage, dust, pollen grains, chemical fertilizers, vehicular smoke, algae, pesticides, waste of animals and birds.

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Q 20Fill In The Blanks.1 Mark

Problem of …………… pollution increases due to soil pollution.

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Q 21Fill In The Blanks.1 Mark

Soil ………… decreases due to pollution.

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Q 22Fill In The Blanks.1 Mark

Boards indicating the …………. are displayed in busy squares in metro cities.

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Q 23Fill In The Blanks.1 Mark

Air pollutants with ……….. cause colour change in paints, oil paintings, nylon, etc.

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Q 24Fill In The Blanks.1 Mark

Natural pollutants are destroyed in due course of time by …………. .

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Q 25Answer the following question.3 Marks

Who implements the laws related to pollution?

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Q 26Answer the following question.3 Marks

What are the different laws to prevent pollution?

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Q 27Answer the following question.3 Marks

How do biodegradable and non- biodegradable wastes cause land pollution?

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Q 28Answer the following question.3 Marks

What adverse effect does ozone depletion have?

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Q 29Answer the following question.3 Marks

Whether the pollutants are degradable or non-degradable?

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Q 30Match The Columns/pair.5 Marks

Column ‘A’	Column ‘B’
1. Water containing cobalt	a. Mental retardation
2. Methane gas	b. Paralysis
3. Water containing lead	c. Inflammation of lungs
4. Sulphur dioxide	d. Skin cancer
5. Nitrogen dioxide	e. Irritation of eyes

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Q 31Answer the following question.5 Marks

Give 5 examples of each of domestic waste, biological waste and agricultural waste and write in your own words about soil pollution due to those wastes.

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Q 32Answer the following question.5 Marks

Whether the vehicles with two- stroke engine cause more pollution than four stroke engine?

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Q 33Answer the following question.5 Marks

What are the reasons other than those mentioned on the textbook page no. 55 mentioned responsible for air pollution?

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Q 34Answer the following question.5 Marks

If natural materials are pollutants, why do we not perceive their adverse effects during their use? When such materials are referred as pollutants?

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Q 35Answer the following question.5 Marks

How do you protect soil from being polluted?