Question # 1

Unit of ozone is?

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Debye

Dobson

Esu

Coulumb

Which gas produces air pollution?

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oxides of sulphur

oxides of carbon

all of these

Which gases are produced from landfills?

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NH₃

H₂S

N₂

All of these

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

Property due to which water acts as a universal solvent is

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Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

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

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Four

Two

Three

Five

Hydrosphere includes

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Seas and rivers

Ocean & polar ice caps

Ground water

All of above

The percentage of SO₂ produced by volcanoes is:

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47%

57%

67%

77%

The words smog is a combination of smoke and:

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fog

foke

fork

fizzy

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

Organic pollutants in water are measured by

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DO

COD

Water logging

PH

Which is not the condition for the formation of smog

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there must be sufficient NO gas

there must be sunlight to help photo chemical reactions to take place

air must be blowing swifty

there must be SO₂in the air

Peroxyacetylnitrate (PAN) is an irritant to human beings and it affects:

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Eyes

Ears

Stomach

Nose

The smog having high contents of SO₂is

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Neutral smog

Reducing smog

Oxidizing smog

Artificial smog

The most important pesticides are:

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Herbicides

Insecticides

Fungicides

All

Which of the following waster material is not recycled for use again

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paper

plastic

hides of animals

glass

Water which his considered to be safe for human consumption is known as

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distilled water

contaminated water

potable water

rain water

Factors affecting quality of water:

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D.O

BOD

COD

a,b,c

In water the most important oxidizing agent is dissolved molecular oxygen which ranges form

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2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Which is not considered as pollutant

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O₃

CO₂

NO₂

SO₂

Ozone layer is present in

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Troposphere

Stratosphere

Mesosphere

Ionosphere

Chemicals used to kill herbs are:

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Herbicides

Insecticides

Pesticides

Fungicides

The pH rain of acid rain is

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8 - 7

7 - 6.5

6.5 - 6

less than 5

Photochemical smog consists of higher concentration of:

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Oxidants

Ozone

a & b

NO₃

Leaching of nutrients is due to

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Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

Ozone is a gas having boiling point

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Unstable

High

Low

Moderate

Chemical like Al₂(SO₄) or alum are used in purification of water druing step:

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aeration

coagulation

chlorination

treatment

Which is the following is true about galvanic cell:

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Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

Splitting of spectral lines when atoms are subjected to strong electric field is called:

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Compton effect

Stark effect

Zeeman effect

Photoelectric effect

Chemicals used to kill insects are:

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Herbicides

Insecticides

Pesticides

Fungicides

Which is not an air pollutant

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N₂

CO

NO

N₂O

Which of the following waste material is not recycled for use again

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Glasses

Paper

Plastic toys

Hides of animals

One of the environmental problem is the formation of oil slicks when oil is spilled form tankers in sea water. Which treatment is suitable to remove oil slicks

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Blow air

Add Na₂CO₃

Use a specially made sorbent having fluorine trapped in it

Use a sorbent having Al₂O₃trapped in it

Incineration is a process in which solid waste is burned at high temperature ranging from

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500 to 600°C

900 to 1000°C

1000 to 1100°C

600 to 700°C

Water cover earth surface more than:

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50%

60%

70%

80%

Which one is more toxic?

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Fe

C

Hg

Ag

The reason of acid rains is

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Release of CO in excess by in complete combustion

Excess release of NO₂and SO₂from buring of fossil fules

Formation of excess CO₂due to combustion and respiration

Formation of NH₃in excess from industry and coal gas

Fungicides are the pesticides which

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Kill plants

Kill herbs

Kill insects

Control the growth of fungus

In Purification of potable water the coagulant used is

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nickel sulpahte

copper sulpahte

barium sulphate

alum

Which factor is helping to reduce the environment pollution

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rapid growth population

urbanization

idustrialization

increase of plantation

Acidification of soil can leach metal:

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Al

Hg

Pb

Ca

Chlorofluorocarbons and aerosols are inert in sphere:

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troposphere

stratosphere

lithosphere

hydrosphere

Which factor is helping to reduce the environmental pollution

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Urbanization

Industrialization

Increase of plantation

Rapid growth of population

Carbon Monoxide is:

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colouriess

orderless

high toxic

All of these

COD of water can be measured by

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Cr₂O₃

Cr₂O₄^-2ions

Cr₂O₇^-2ions

None of these

Diseases like dysentery, typhoid and hepatitis are caused by mixing of in water:

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Live stock wastes

Oil spilage

detergents

pesticides

What is component of environment?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Which not a method for solid waste management>

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Landfill

Incinerating

Recycling

None of these

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

DDT is a:

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Fungicide

Insecticide

Herbicide

All

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount

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iodine

bromine

lead

carbon

What is the morality of a solution containing 15g of urea is 500cm³ of solution?

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1M

0.5M

2M

1.5M

BOD means

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Boron oxygen deuterium

Biochemical oxygen demand

Biochemical oxygen dissolved

Biochemical oxygen death

Sulphate aerosols cause severe respiratory problems particularly among

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Infants

Women

Young people

Old people

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

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50,000

10,000

20,000

None of these

Agriculture consumes part of fresh water:

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1%

2%

69%

23%

Leather tanneries use big auantities of:

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Cr Vi salts

Cr III salts

Mn-salts

Pb-salts

Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

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2 days

5 days

6 days

7 days