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Biology NEET 2023 > XII: Chapter 16- Environmental Issues > Flashcards

XII: Chapter 16- Environmental Issues Flashcards

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1
Q

When was the Environmental (protection) Act passed?

A

1986

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2
Q

Should the velocity of the air passing through electrostatic precipitator be low or high?

A

It should be low enough to allow the dust to fall

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3
Q

According to _____________ particulate size 2.5micrometers or less in diameter (PM 2.5) are responsible for causing the greatest harm to human health.

A

Central Pollution Control Board (CPCB)

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4
Q

When did the Air (Prevention and Control of Pollution) Act come into force?

A

1981

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5
Q

When was the Air (Prevention and Control of Pollution) Act amended to include noise as an air pollutant?

A

1987

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6
Q

In 1991, which position did Delhi grab in the list of the 41 most polluted cities of the world?

A

4th

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7
Q

According to Euro III laws, in diesel and petrol sulphur should be controlled at

A

Diesel- 350 ppm

Petrol- 150 ppm

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8
Q

According to Euro III laws aromatic hydrocarbons should be contained at what percent of the concerned fuel?

A

42%

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9
Q

When was the Water (Prevention and Control of Pollution) Act passed?

A

1974

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10
Q

Which metals are characterised as heavy metals?

A

Metals with density greater than 5 gm/(cm^3)

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11
Q

In Arcata, biologists developed a series of six connected marshes over ____ hectares of marshland.

A

60 hectares

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12
Q

Which institutions did Ahmed Khan collaborate with to blends of polyblend and bitumen which enhanced the bitumen’s water repellant properties?

A

R.V College of Engineering and Bangalore city corporation.

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13
Q

Clouds and gas reflect about __(1)___ of the incoming solar radiation and absorb some of it, but almost __(2)__ of incoming solar radiation falls on Earth’s surface heating it.

A

(1) - one fourth

(2) - half

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14
Q

WHat percent of the total green house gases consists of carbon dioxide.

A

60%

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15
Q

WHat percent of the total green house gases consists of N2O?

A

6%

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16
Q

WHat percent of the total green house gases consists of methane?

A

20%

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17
Q

WHat percent of the total green house gases consists of CFCs?

A

14%

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18
Q

During the past century, the temperature of the earth has increased by

A

0.6°C

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19
Q

In which units is the thickness of the ozone layer measured?

A

Dobson units (DU)

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20
Q

Inflammation of cornea due to UV-B is also known as

A

Snow blindness

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21
Q

UV-C damages DNA and mutation may occur. True/false?

A

False.

UV-B damages DNA and mutation may occur.

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22
Q

When was the Montreal protocol signed and for what?

A

1987, regarding ozone depletion

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23
Q

In the beginning of the twentieth century, forests covered about __(1)__ percent of the land of India. By the end of the centurey, it shrunk to __(2)__ per cent.

A

(1) - 30%

(2) - 19.4%

24
Q

Thr National Forest Policy of India has recommended __(1)__ percent forest cover for plains and __(2)___ for hills.

A

(1) - 33%

(2) - 67%

25
Q

When and where did Chipko movement occur?

A

In Garhwal Himalayas, 1974

26
Q

When was the concept of joint forest management introduced in India?

A

1980s

27
Q

Is DDT a primary pollutant or a secondary pollutant?

A

Primary pollutant

28
Q

Is benzyl hexachloride (BHC) a primary pollutant or a secondary pollutant?

A

Primary pollutant

29
Q

Is ozone a primary pollutant or a secondary pollutant?

A

Secondary

30
Q

Is PAN ( peroxyacyl nitrate) a primary pollutant or a secondary pollutant?

A

Secondary

31
Q

The formation of secondary pollutants by the action of one or more primary pollutants is called

A

Synergism

32
Q

Which are the most harmful gaseous pollutants?

A

sulphur dioxide, sulphur trioxide

33
Q

TOxicity of copper in humans can cause

A

Hypertension and uremia

34
Q

Which isotope of strontium is carcenogenic?

A

Sr-90

35
Q

Which isotope of iodine is carcenogenic?

A

I-131

36
Q

Which smog is also known as Los Angeles smog?

A

Photochemical smog

37
Q

Which smog is also known as London smog?

A

Sulfur smog

38
Q

What are the component of photochemical smog?

A

Smoke+fog+ oxides of nitrogen +hydrocarbons+ UV light+PAN+ozone

39
Q

Which smog is caused due to high temperature?

A

Photochemical smog

40
Q

Which smog is caused due to low temperature?

A

Sulfur smog

41
Q

What are the component of sulfur smog?

A

Smoke + fog + S + coal + vapours of sulphuric acid

42
Q

What is the effect of PAN in plants?

A

Inhibits photolysis of water during photosynthesis, inhibit chlorophyll formation and PSII

43
Q

Bhopal gas tragedy occurred due to the accidental leakage of

A

Methyl isocyanide and phosgene

44
Q

Which radioactive element does tobacco smoke contain?

A

Polycyclic radioactive polonium (P-210)

45
Q

Sound is categorized as noise at how many decibels?

A

80 dB

46
Q

What is maximum permitted sound in resedential zone in day?

A

65 dB

47
Q

What is the maximum permitted sound in silence zone in day?

A

50 dB

48
Q

Minamata disease is caused due to

A

mercuric poisoning

49
Q

Cadmium poisoning in humans can cause

A

Itai-itai disease

50
Q

Blue baby syndrome is caused due to

A

nitrate poisoning

51
Q

Dissolved oxygen content of water is measured using

A

Oxymeter

52
Q

Positive soil pollution is caused due to

A

Addition of pollutants in soil

53
Q

Negative soil pollution is caused due to

A

Washing away of top soil

54
Q

What is known as carbon dioxide fertilisation effect?

A

Increase in rate of photosynthesis because of increase in carbon dioxide concentration

55
Q

El Nino happens over which ocean?

A

Pacific ocean

56
Q

Kyoto protocol is related to which environmental issue?

A

Climatic change and greenhouse gases

57
Q

The ozone hole is present over which region of earth?

A

Anctartic regiion

Biology NEET 2023 (39 decks)

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