Environmental Issues. - Tamil Nadu Board STD 12 Bio Zoology Questions

Q 1Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Statement (1): The intensity of noise is measured in dobson (dB) unit.
Statement (2): Noise provides immense bliss.

A
Statement 1 is true, statement 2 is false
B
Statement 1 is false, statement 2 is true
C
Both Statements 1 and 2 are true
✓
Both statements 1 and 2 are false

Answer: D.

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Q 2Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Statement (1): Incomplete combination of fossil fuels release CO
Statement (2): CO is a GHG

A
Statement 1 is true, statement 2 is false
B
Statement 1 is false, statement 2 is true
✓
Both Statements 1 and 2 are true
D
Both statements 1 and 2 are false

Answer: C.

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Q 3Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Assertion (A): Evolution of Greenhouse gases leads to Global warming
Reason (R): The energy released by the greenhouse gases move away from the atmospheric surface

✓
A is right R is wrong
B
A is wrong R is right
C
Both A and R are correct
D
R explains A

Answer: A.

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Q 4Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Identify the incorrect statement.
(i) EcoSan toilets is a sustainable way for handling human excreta by using dry composting toilets
(ii) It reduces waste water generation
(iii) It is based on recovery and recycling of nutrients from excreta
(iv) EcoSan toilets are used in several parts of India and Srilanka.Assertion (A): Ozone layer protects the UV rays entering the Earth.
Reason (R): UV rays may cause melanoma

A
A is right R is wrong
B
A is wrong R is right
C
Both A and R are correct
✓
R explains A

Answer: D.

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Q 5Choose the most appropriate answer from the given alternatives and write the option code and the corresponding answer.1 Mark

Treatment of sewage involves

A
Floatation, Filtration and Sedimentation of suspended particles
B
Aerating it for bacterial action
C
Removal of nitrates and phosphates
✓
All of the above

Answer: D.

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Q 6[ 2 Marks Questions ]2 Marks

Name the scientist who discovered ozone layer

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Q 7[ 2 Marks Questions ]2 Marks

List any four adverse effect of noise.

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Q 8[ 2 Marks Questions ]2 Marks

What is the unit of measuring ozone thickness?

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Q 9[ 2 Marks Questions ]2 Marks

Complete the following : (a) Smoke + ______ = Smog

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Q 10[ 2 Marks Questions ]2 Marks

Define deforestation.

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Q 11Match The Following.4 Marks

Match List I with List II

List I (Waste category)	List II (Source of waste)
(a) Residential	(i) Spoiled food
(b) Agriculture	(ii) Mouse
(c) E-waste	(iii) Electronics
(d) Institutional	(iv) Batteries

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Q 12[ 3 Marks Questions ]3 Marks

How radioactive waste are managed? Suggest few methods of disposal of radioactive waste.

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Q 13[ 3 Marks Questions ]3 Marks

Categorize the soild waste and their sources.

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Q 14[ 3 Marks Questions ]3 Marks

How agrochemicals affect ecosystem?

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Q 15[ 3 Marks Questions ]3 Marks

Point out the effects of Noise pollution.