Question # 1

The range of UV-B is:

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320 to 400 nm

200 to 280 nm

280 to 320 nm

50 to 400 nm

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

Primary pollutants are:

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oxides of sulphur

oxides of carbon

oxides of nitrogen

All of these

Amount of ozone in atmosphere is expressed in units:

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Kilograms

cm

molarity

DU

Insoluble ferric oxide is produced in the pH range:

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1 to 8

6 to 9

3 to 13

8 to 13

The amount of Si in the lithosphere is about

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27.72%

30.35%

35.30%

40.21%

Rigid rocky crust earth upto a depth of 100 km is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Newspapers can be recycled again and again by how many times

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5

2

4

3

In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this

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Cobalt

Nickel

Arsenic

Sulphur

Fresh water of total earth water is:

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1%

2%

3%

4%

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

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

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Sulphuric acid

Nitric acid

Sulphurous acid

Acetic acid

Chlorination of water is effective for

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Killing pathogens

Removing dust

Removing hardness

Increasing oxygen content

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 morality of the solution containing x grams ammonium sulfate in 500cm3 of the solution is 0.6 what is x?

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39.6

40.5

42.7

45.1

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

Site of land for landfill is selected based upon.

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topography

location of ground

water table

All of these

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

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

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Four

Two

Three

Five

Commonly used coagulants are ions of:

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Ferrous

Al

Cr

Ferric

Chemical equilibrium involving reactants and products in more than one phase is called:

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Homogeneous

Heterogeneous

Dynamic

Static

A pollutant affects

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Human affects

Quality of life

Functioning of ecosystem

All of these

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

During incineration temperature range of non-rotating chamber is

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900-1000C°

650-1100C°

950-1300C°

700-900C°

Boron, aluminium, gallium, indium and thallium belong to group lll-A of the periodic table show a decrease with increasing relative atomic mass:

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Ionic character of the compounds

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation

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

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Eyes

Ears

Stomach

Nose

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

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aeration

coagulation

chlorination

treatment

Ozone acts as:

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Pollutant

saver

oxidatant

All of these

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

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Elements in lithosphere exist generally as:

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metals

non-metals

metalloids

minerals

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Which of the following air pollutant is called quiet killer

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PAN

CO

NO₃

SO₃

Synthetic organic pesticides formulated nowadays are more then:

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One thousand

Ten thousand

Two thousands

Twenty thousand

Sulphate aerosols cause severe respiratory problems particularly among

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Infants

Women

Young people

Old people

Increased awareness of environment issues has led chemist 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

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

Air pollution causes

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Acid rain

O₃ depletion

Green House Effect

All

Which gases are produced from landfills?

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NH₃

H₂S

N₂

All of these

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

SO₂and NO₂cause pollution due to increase in

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Buffer action

Basicity

Acidity

Neutrality

Coal contains sulphur in it:

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1-3%

1-6%

1-9%

1-12%

Surface and ground water sources are contaminated by various human activities. Which of the following is not human activity that causes contamination in fresh water

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Live stock waste

Oil leaks and spills

Desposal of industrial effluents

Rain

Which one of the following is used as coagulant for purification potable water

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Copper sulphate

Alum

Barium sulphate

Nickel sulphate

Water cover earth surface more than:

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50%

60%

70%

80%

Ozone layer is present in

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Troposphere

Stratosphere

Mesosphere

Ionosphere

99.5% mass of lithosphere is made of

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03 elements

8 elements

11 elements

15 elements

Which gas produces air pollution?

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oxides of sulphur

oxides of carbon

all of these

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

Which of the following is a macronutrient?

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Boron

Iron

Copper

Carbon

Coagulation removes suspended particles in ran water:

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60%

70%

80%

90%

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

SO₂makes ___________ acid rains

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carbonic acid

Sulfuric

Nitric acid

All of these

Water is essential for life on

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Moon

Space

Earth

Sun

Half of the mass of atmosphere is concentrated above earth at the hieght of

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40 Km

25-28 Km

5-6 Km

100 Km

Density of water becomes maximum at

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10°C

4°C

5°C

12°C

Natural water is

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Pure

Impure

Acts as solute

Distilled

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5