Question # 1

DDT is a:

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Fungicide

Insecticide

Herbicide

All

Exposure to CO results in

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Headche

Fatigue

Unconsciousness

All of these

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

The pH range of the acid rain is

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6.5 - 6

Less than 5

8 - 7.5

7 - 6.5

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

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Rain

Live stock waste

Oil leaks and spills

Disposal of industrial effluents

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

Elevated concentration of ______________ is harmful for fish as it clog the gills causing suffocation

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AI

Hg

As

Cr(vi)

In big/metropolitan cities, atmosphere is mostly polluted due to

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Radioactive fall out

Household waste

Pesticide residue

Automobile exhausts

BOD means

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Boron oxygen deuterium

Biochemical oxygen demand

Biochemical oxygen dissolved

Biochemical oxygen death

Leaching of nutrients is due to

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Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

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

The layer of gases around the earth are called?

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Atmosphere

Hydrosphere

Lithosphere

All of these

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)

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

The incineration may reduce volume of wastes upto:

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1/4th

1/2nd

2/3rd

3/4th

Detergent greatly effects the

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Aquatic life

Modern life

Terrestrial life

Plants life

Which is not considered as pollutant

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O₃

CO₂

NO₂

SO₂

The percentage of SO₂ produced by volcanoes is:

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47%

57%

67%

77%

Hydrosphere covers the surface of erath:

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70.8%

71.8%

72.8%

73.8%

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

Major cause of SO2 on global scale is

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Volcanoes

Electric sparks

Combustion

All

The disposal of domestic refuse, commercial and industrial solid wastes are studied under the title

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Solid waste management

Waste management

Solid management

Semisolid management

Augus smith discovered in the mid of seventeenth century:

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acid

Base

Acid rain

Fertilizer

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

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Eyes

Ears

Stomach

Nose

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

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Sulphuric acid

Nitric acid

Sulphurous acid

Acetic acid

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

Leather tanneries use big auantities of:

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Cr Vi salts

Cr III salts

Mn-salts

Pb-salts

Primary pollutants are:

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oxides of sulphur

oxides of carbon

oxides of nitrogen

All of these

During thunderstorms, water dissolves

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Dust particles

HCl

Nitric acid

Clouds

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

Ozone is produced in regions:

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tropical

Polor

antaric

equator

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

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

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