Question # 1

Part of fresh water consumed in industry is:

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1%

2%

69%

23%

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

The layer of earth around the earth is called:

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Atmosphere

Hydrosphere

Lithosphere

Biosphere

Which not a method for solid waste management>

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Landfill

Incinerating

Recycling

None of these

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

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Pb

Cr

Hg

All of these

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

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sulphates

sulphites

sulphides

sulphate aerosols

Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil

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diffusion

convection

electrophoresis

chromatography

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

Newspaper can be recycled again and again by how many times?

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2

3

4

5

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

99.5% mass of lithosphere is made of

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03 elements

8 elements

11 elements

15 elements

Polar ice caps can melt due to

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Acid rain

Green House Effect

Smog

Chlorofluorocarbons

The concentration of dissolved molecular oxygen in water which acts as the most important oxidizing agent ranges from

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2 ppm - 6 ppm

2 ppm - 4 ppm

4 ppm - 8 ppm

2 ppm - 3 ppm

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

Ozone is produced in regions:

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tropical

Polor

antaric

equator

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

Water exist in only

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One state

Two state

Three states

4 states

Men residence time of methane in atmosphere in years is:

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1-7

2-7

3-7

4-7

The temperature in the incineration of industrial and hazardons waster process had a range

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950 to 1300°C

500 to 900°C

250 to 500°C

900 to 1000°C

The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required

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To help plant to under go photosynthesis

To destroy nitrogen oxide from the atmosphere

To help to clean the atmosphere

To help in fixing of bacteria

Which of the following substance is not present in acid rain?

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Sulphuric acid

Nitric acid

Sulphurous acid

Acetic acid

Ph of unpolluted rain water is

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07

Less than 6

5.6

Less than 5

Which gases are produced from landfills?

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NH₃

H₂S

N₂

All of these

Water is essential for life on

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Moon

Space

Earth

Sun

A single chlorine free radical can destory how many ozone molecules

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10

100

1000

10000

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

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Live stock wastes

Oil spilage

detergents

pesticides

Which one of the following is an organic compound?

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Calcium carbide

Calcium cyanide

Carbon disulphide

None of these

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

The normal amount of overhead ozone is about in DU:

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150

250

350

450

A single free chlorine redical can destroy ozone molecules upto:

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100000

100

1000

10000

The pH range of the acid rain is

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7 - 6.5

6.5 - 6

6 - 5.6

Less than 5

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:

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Ionic bonding

Metallic bonding

Bridge bonding

H-bonding

Which one of the following does not act as pollutant

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Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

Detergent greatly effects the

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Aquatic life

Modern life

Terrestrial life

Plants life

Density of water becomes maximum at

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10°C

4°C

5°C

12°C

Exposure to CO results in

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Headche

Fatigue

Unconsciousness

All of these

Ozone in most of the tropical regions acts as a pollutant and cause

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damages to eyes

aggravates asthma

chest discomfort

all of these

The pH of the rain water in areas where acid rain is the cause of pollution may be

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6.5

5.6

4.5

2.2

During incineration temperature range of non-rotating chamber is

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900-1000C°

650-1100C°

950-1300C°

700-900C°

What is the cause of water pollution

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Chemical and bacterial constants in live stock

The spilled oil in rivers and ponds

Wide spreads used of pesticides

All of these

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases

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NO₂

SO₂

Hg

Pb

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

Which gas is not a constituent of atmosphere?

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Xe

O₃

H₂

F₂

Which is not considered as pollutant

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O₃

CO₂

NO₂

SO₂

Global warming is mainly caused by ______ radiations

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UV

I.R

gama

X-rays

Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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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

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

Hardness which can be removed by boiling is called

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Permanent hardness

Temporary hardness

Stiffness

Toughness

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is

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2: 1

1: 2

3: 1

4: 1

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

Coal contains sulphur in it:

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1-3%

1-6%

1-9%

1-12%

Pathogens in raw water are killed in step:

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aeration

coagulation

chlorination

treatment