Question # 1

A pollutant affects

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Human affects

Quality of life

Functioning of ecosystem

All of these

Which one of the following does not act as pollutant

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Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

Major cause of SO2 on global scale is

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Volcanoes

Electric sparks

Combustion

All

Commonly used coagulants are ions of:

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Ferrous

Al

Cr

Ferric

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

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

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reduction

Aeration

Electrolysis

Co-angulation

Water bodies are included in:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Which one of the following is not a component of environment

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Biosphere

Stratosphere

Hydrosphere

Lithosphere

Which factor is helping to reduce the environment pollution

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rapid growth population

urbanization

idustrialization

increase of plantation

Chemicals used to kill pests are:

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Herbicides

Insecticides

Pesticides

fungicides

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

Which is not considered as pollutant

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O₃

CO₂

NO₂

SO₂

Water is considered pollutant when value of Do is

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6 PPM

8 PPM

03 PPM

10 PPM

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

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

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Copper sulphate

Alum

Barium sulphate

Nickel sulphate

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Polycyclic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

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

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Glasses

Paper

Plastic toys

Hides of animals

Proxy acetyl nitrate (PAN) is an irritant to human beings and it affect

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Nose

Stomach

Eyes

Ears

Leather tanneries use big auantities of:

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Cr Vi salts

Cr III salts

Mn-salts

Pb-salts

Augus smith discovered in the mid of seventeenth century:

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acid

Base

Acid rain

Fertilizer

Temporary hardness can be removed by adding

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Lime

Carbon

Oxygen

Slaked lime

How much pesticides have been synthesized at present?

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Four thousand

Six thousand

Eight thousand

Ten thousand

What is the effect of polluted air on environment

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Ozone

Acid rain

Global warming

Smog

COD of water can be measured by

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Cr₂O₃

Cr₂O₄^-2ions

Cr₂O₇^-2ions

None of these

Chemicals used to kill fungi are:

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Herbicides

Insecticides

Pesticides

fungicides

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

One of the environment problem is the formation of oil slicks when oil is spilled from 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

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

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

Water which forms scum with soap is called

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Hard water

Soft water

Distilled water

Un distilled water

Ozone layer is high:

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20-23 km

22-25 km

23-26 km

25-28 km

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

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

Ozone gas has boiling point:

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Low

High

Medium

Highest

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)

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

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Homogeneous

Heterogeneous

Dynamic

Static

A single chlorine free radical can destroy how many ozone molecules

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100

100000

10000

10

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

For incineration temperature range is (in ^oC)

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700-800

800-900

900-1000

1000-1100

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

Hydrosphere includes

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Seas and rivers

Ocean & polar ice caps

Ground water

All of above

The film forming components of paints are

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resins

thinners

pigments

driers

In incinerating the waste is burnt at

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1000°C

100°C

2000°C

1500°C

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

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

Part of fresh water consumed in industry is:

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1%

2%

69%

23%

Detergent greatly effects the

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Aquatic life

Modern life

Terrestrial life

Plants life

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

Ozone acts as:

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Pollutant

saver

oxidatant

All of these

Ozone is effectively removed by

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TNT

CFCs

PVC

CNG

Natural water is

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Pure

Impure

Acts as solute

Distilled

How can heavy metal contamination like the presence of Hg or Pb may be removed from the soil

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by using water spray

by blowing air

by treating with EDTA and then flushing the heavy metal complex out of the soil

by adding CaO

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 pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

NO and NO₂gases in atmosphere are represented by

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NO

NO₄

NO_x

N_xO_y

Water is purified by:

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Filtration

aeration

coagualation

All of these

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄