Question # 1

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

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Live stock wastes

Oil spilage

detergents

pesticides

The words smog is a combination of smoke and:

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fog

foke

fork

fizzy

Synthetic organic pesticides formulated nowadays are more then:

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One thousand

Ten thousand

Two thousands

Twenty thousand

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

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

Which is not a component of environment?

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Biosphere

Lithosphere

Hydrosphere

None of these

Reason of pollution are:

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Population and urbanization

Transportation

Industrialization

All of these

The region of earth capable of supporting life is

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

Depletion of ozone is more during the month:

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Jan-March

April-Jun

July-Aug

Sept-Nov

Ozone is usually produced in the

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South polar region

North pole region

Tropical region

Thermosphere zone

Lead pollution is mainly due to

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Metallic pollution

Space pollution

Acid rain

Cd pollution

Electropositive character increases down the groups due to:

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Increase in atomic size of the elements

Decrease in ionization potential

Decreases in electromagnetically of the element

All the above

Polar ice caps and glaciers consists total earth water:

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1%

2%

3%

4%

Ozone gas has boiling point:

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Low

High

Medium

Highest

Choose the chief air pollutant among the following which depletes ozone layer

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Carbon monoxide

Carbon dioxide

Chloroflurocarbons and nitrogen oxides

Sulphur dioxide

Increased awareness of environmental issues has led chemists to develop products and processes that do not impact on the environment in terms of pollution or depletion of sources. To help chemist to achieve this aim, some principles are drawn. Which one is not the guiding principle

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Avoid waste production

Use no solvent

Use a catalyst

Devise a multistep procedure for synthesis of new compounds

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

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 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

CFC's are known to cause depletion of ozone layer therefore their use has been banned in refrigerators and air conditioners. Which alternate compound may be suitable to replace CFC

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CCl₄

CHCl₃

CH₃- CH₂- CH₂- CH₃

CHCl₂- CHF₂

The Catalyst used in the contact tower for the manufacture of H₂SO₄ is easily poisoned by:

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Nitrous oxide

Nitrogen gas

Arsenic oxide

Carbon dioxide

Term ozone hole is used for depletion of ozone during months of:

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Jan-Feb

March - Sep

Sep- Nov

Dec-Feb

White marble buildings are effected by?

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O₂

SO₂

CI₂

CFC_s

Materials suspended in water or present as colloidal form in raw water are removed by:

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aeration

coagulation

chlorination

treatment

The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?

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Coal tar

CO₂

Coal gas

Coke

Leaching of nutrients is due to

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Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

Augus smith discovered in the mid of seventeenth century:

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acid

Base

Acid rain

Fertilizer

a hole used to dump the municipal wastes is called:

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landfill

effluents

leachate

inclneration

Density of water becomes maximum at

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10°C

4°C

5°C

12°C

Potable water is considered to be

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Safe for human consumption

The ground water

The surface water

Now safe for human consumption

Amount of ozone in atmosphere is expressed in units:

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Kilograms

cm

molarity

DU

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

Which is used as a coagulant:

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Ferric salts

Potash alum

a and b both

Chlorine

Photo chemical smog contains ______ as main reactants

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Nitrons oxide and unburnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

No and burnt hydrocarbons

N₂O and burnt hydrocarbons

The ozone depletion in the stratophere is mainly due to the reaction of ozone with

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Freons

CFCs

Both A and B

None

Forms of waste products:

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Heat

Smoke

Solid

All of these

Ecosystem is a smaller unit of

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Hydrosphere

Lithosphere

Biosphere

Atmosphere

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

Requirement of macronutrient per acre of the land is

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5 to 200 kg

20-200 kg

200-400 kg

30-400 kg

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

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Glasses

Paper

Plastic toys

Hides of animals

Coagulation removes suspended particles in ran water:

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60%

70%

80%

90%

Chloroform is carcinogenic:

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Heart

Lungs

Liver

Kidney

The pH range of the acid rain is

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6.5 - 6

Less than 5

8 - 7.5

7 - 6.5

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

Solid waster of the city is disposed off by dumping in a landfill. Which of the following gas is produced in the landfill

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Oxygen

Chlorine

Hydrogen sulphide

Hydrogen chloride gas

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

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2

3

4

5

Troposphere extends upto km:

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0-15 km

10-15 km

15-40 km

Chose a point which is not included in the components of environment

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Stratosphere

Hydrosphere

Lithosphere

Biosphere

Water is purified by the process:

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Aeration

Coagulation

Chlorination

All of these

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

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live stock waste

agricultural pesticides

oil beaks and spills

all of the above

Contamination of Hg comes into surface water from chlor industrial wastes. Why is Hg toxic

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It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is reactive chemically

The semi solid wastes in landfills is called:

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Landfill

effluents

Leachate

Incineration

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)

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

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

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benzene

minerals

hydrocarbons

phenols

Exhaust fumes of cars contain which poisonous gas

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CH₄

C₂H₆

CO

All of these

Which is not an air pollutant

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N₂

CO

NO

N₂O

Which 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

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds