Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Botany > Enviormental Issues > Flashcards

Enviormental Issues Flashcards

1
Q

Any undesirable change in physical, chemical or biological characteristics of air, land, water or soil is called:-

A

Pollution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

In order to control environmental pollution, the Government of India has passed the act:-

A

Environment (protection)act 1986

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

_____ pollutants reduce growth and yield of crops and cause premature death of plants

A

Air pollutants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Harmful effects of pollutants depend on duration of exposure, the organism and the ________

A

Concentration of the pollutant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

The most widely used device to remove particulate matter is:-

A

Electrostatics precipitator

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

An electrostatic precipitator can remove over ______ percent particulate matter present in the exhaust from a thermal power plant

A

99%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

An electrostatic precipitator has electrode wires, which produce a _________ that releases electrons.

A

Corona

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The ___________ of air between the plates must be low enough to allow the dust to fall

A

Velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

A ____________ can remove gases like sulphur dioxide from exhaust

A

Scrubber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In a scrubber, the exhaust is passed through a spray of:-

A

Water or lime

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

According to CPCB, particulate matter of size __________________ or less in diameter are responsible for causing the greatest harm to human health.

A

2.5micrometers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

A major cause for atmospheric pollution in the metro cities is:-

A

Automobiles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Proper maintenance of automobiles along with use of _______________ or diesel can reduce the pollutants they emit

A

Lead free petrol or diesel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The metals used as the catalysts by catalytic converters are:-

A

Platinum palladium ,rhodium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Catalytic converter converts unburnt hydrocarbons into _________ and _________.

A

Carbon dioxide and water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Catalytic converter converts Harmful gases like ____________ and ____________ into carbon dioxide and nitrogen gas, respectively.

A

Carbon monoxide and nitric oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Motor vehicles equipped with catalytic converter should use _________ petrol

A

Lead free or unleaded

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Lead present in the petrol inactivates the _____________ of catalytic converter.

A

Catalyst

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

In India, the Air (Prevention and Control of Pollution) Act came into force in the year:-

A

Law given in 1981

Amended in 1987

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

The Air (Prevention and Control of Pollution) Act was amended in 1987 to include ________ as an air pollutant.

A

Noise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Undesirable high level of sound is called:-

A

Noise

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

High sound level of 150 dB or more can damage ___________ thus permanently impairing hearing ability.

A

Ear drums

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Delimitation of _________ zones around schools and hospitals is recommended to reduce noise pollution.

A

Horn free

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Permissible sound-levels of ________ and of _________ should be enforced to avoid noise pollution.

A

Crackers and loud speakers

25
Q

In the 1990s, Delhi ranked _______ among the 41 most polluted cities of the world

A

Fourth

26
Q

PIL

A

Public Interest Litigation

27
Q

All the buses of Delhi were converted to run on ______ by the end of 2002

A

CNG

28
Q

_______ burns most efficiently, unlike petrol or diesel, in the automobiles and very little of it is left unburnt.

A

CNG

29
Q

Use of ___________ in vehicles is recommended to reduce air pollution.

A

Catalyst converters

30
Q

Use of unleaded and ___________ petrol is recommended to reduce pollution level

A

Low sulphur

31
Q

In order to cut vehicular pollution in India, it is recommended to reduce __________ and ___________ content in petrol and diesel fuels.

A

Sulphur, aromatic

32
Q

The norms that stipulate sulphur to be controlled at 350 ppm in diesel and 150 ppm in petrol are:-

A

Eurolll norms

33
Q

Government of India has stipulated that aromatic hydrocarbons are to be contained at ____% of the concerned fuel.

A

42

34
Q

The goal, according to the roadmap, is to reduce sulphur to ____ ppm in petrol and diesel

A

50

35
Q

Water (Prevention and Control of Pollution) Act was passed to safeguard water resources of India in the year:-

A

1974

36
Q

Sand, silt and clay are _____________ of

A

Suspended solids

37
Q

Nitrate, ammonia, phosphate, calcium and sodium are _____________ impurities present in sewage water.
dissolved

A

Dissolved

38
Q

_______% impurities make domestic sewage water unfit for human use.

A

0.1

39
Q

Domestic sewage primarily contains ____________ organic matter

A

Biodegradable

40
Q

The amount of biodegradable organic matter in sewage water is measured by:-

A

BOD

Biochemical oxygen demand

41
Q

Decline in dissolved oxygen content of sewage discharge causes mortality of ___________ and _____________

A

Fish and other aquatic creatures

42
Q

Presence of large amounts of nutrients in waters also causes excessive growth of planktonic (free-floating) algae, called an:-

A

Algal bloom

43
Q

__________________ cause deterioration of the water quality and fish mortality

A

Algal bloom

44
Q

The world’s most problematic aquatic weed is:-

A

Eicchornia crassips

45
Q

Eichhornia crassipes is also called the:

A

Terror of Bengal

46
Q

Water hyacinth grow abundantly in ___________ water bodies

A

Eutrophic

47
Q

Disposal of sewage water directly into water without proper treatment may lead to outbreak of serious diseases like:-

A

Dysentery, typhoid, jaundice, cholera

48
Q

Waste water from industries like petroleum, metal extraction and chemical manufacturing contain heavy metals like:-

A

Mercury, cadmium, copper, lead

49
Q

Heavy metals are defined as elements with density greater than:-

A

5g/cm^3

50
Q

A few toxic substances, often present in industrial waste waters, can undergo ______________________ in the aquatic food chain.

A

Biological magnification

51
Q

The toxic subtances well-known for biomagnification are _________ and ________.

A

Mercury,ddt

52
Q

High concentrations of DDT disturb _________ metabolism in birds

A

Calcium

53
Q

High concentrations of DDT in birds causes _________ of eggshell and their premature ________.

A

Thinning and breaking

54
Q

The natural aging of a lake by nutrient enrichment of its water is called:-

A

Eutrotrophic

55
Q

Introduction of nutrients like ________ and _________ into the lake encourage the growth of aquatic organisms.

A

Nitrogen and phosphorus

56
Q

The phenomenon of pollutants accelerating the process of aging of a water body is called:-

A

Cultural or Accelerated Eutrophication

57
Q

The prime contaminants involved in accelerated eutrophication are _______ and _________.

A

Nitrates and phosphates

58
Q

Excess of nitrates and phosphates in the lake overstimulate the growth of:-

A

Algae

59
Q

Thermal wastewater eliminates or reduces the number of organisms sensitive to:-

A

High temperatures

Botany (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions