Question # 1

Synthetic organic pesticides formulated nowadays are more then:

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One thousand

Ten thousand

Two thousands

Twenty thousand

Chlorination of water is effective for

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Killing pathogens

Removing dust

Removing hardness

Increasing oxygen content

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Ozone is most of the tropical regions acts as a pollutant and causes

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Damages to eyes

Aggravates asthma

Chest discomfort

All of these

The respiration process taking place in animals depends on a difference in

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Partial pressure

Osomotic pressure

Vapour pressure

Atomospheric pressure

Three elements needed for the healthy growth of plants are

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N P K

N K C

N S P

N Ca P

Reason of pollution are:

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Population and urbanization

Transportation

Industrialization

All of these

Which of following is primary pollutants

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N₂O

PAN

H₂SO₄

None of these

Which of the following is not the required condition for the formation of smog

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Sufficient NO

Sunlight

Less movement of air

Winds

A single chloride free radical can destroy the ozone molecules

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100

100000

10000

10

Oxides of sulphur react in atmosphere by various reactions to form:

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sulphates

sulphites

sulphides

sulphate aerosols

COD of water can be measured by

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Cr₂O₃

Cr₂O₄^-2ions

Cr₂O₇^-2ions

None of these

Dissolved impurities of potable water can be separated by the process of

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reduction

Aeration

Electrolysis

Co-angulation

Lithosphere extends upto kilometer of earth crust in depth:

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10 km

100 km

1000 km

10000 km

Petroleum or crude oil is a complex mixture of compounds mainly:

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benzene

minerals

hydrocarbons

phenols

The cause of minamata disease is the pollution of

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Arsenic (As) into atomosphere

Industrial waste having Hg

Organic waste in drinking H₂O

Oil spills in H₂O

Which one of the following is not a component of environment

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Biosphere

Stratosphere

Hydrosphere

Lithosphere

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

How much quantity of water is in the domestic use

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0.08%

16%

24%

90%

Which of the following air pollutant is called quiet killer

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PAN

CO

NO₃

SO₃

Industrial effluents have toxic synthetic organic compounds as well as heavy metals like

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Pb

Cr

Hg

All of these

The main pollutant of leather in the waste water is due to the salt of:

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Lead

Chromium (VI)

Copper

Chromium (III)

Which factor is helping to reduce the environment pollution

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rapid growth population

urbanization

idustrialization

increase of plantation

Unit of ozone is?

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Debye

Dobson

Esu

Coulumb

Which of the following is not a heavy industry?

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Iron

Fertilize

Paper

None

Which one of the following is an organic compound?

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Calcium carbide

Calcium cyanide

Carbon disulphide

None of these

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

How many times a newspaper can be recycled

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02

05

08

10

Value of chemical oxygen demand (COD) is a measure of chemically oxidizable matter in water. Which value of COD will indicate more polluted water

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low value

higher value

both values

none of these

Water cover earth surface more than:

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50%

60%

70%

80%

Ozone layer is

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25 - 28 km high

26 - 29 km high

24 - 27 km high

20 - 28 km high

Residence time of methane in the atmosphere is

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3 - 7 days

2 -3 days

3 - 7 years

2 - 3 years

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

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10,000

20,000

100,000

50,000

alum or aluminium sulphate used as coagulant in alkaline medium change into precipitate of radicals of alumimium.

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sulphates

oxides

hydroxides

chlorides

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