Question # 1

In water the most important oxidizing agent is dissolved molecular oxygen which ranges from

Choose an answer

2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

Choose an answer

Fullerences

Freons

Polyhalogens

Ferrocene

The amount of oxygen in the lithosphere is about

Choose an answer

35.50%

40.60%

56.60%

50.50%

NO and NO₂gases in atmosphere are represented by

Choose an answer

NO

NO₄

NO_x

N_xO_y

What is the cause of water pollution

Choose an answer

Chemical and bacterial contents in live stock

The spilled oil in rivers and ponds

Wide spread use of pesticides

All of the above

Chromium (VI) is highly toxic and can cause

Choose an answer

Blindness

Cancer

Liver problems

Blood problems

Depletion of ozone layer is due to

Choose an answer

Oxides of nitrogen

Oxides of carbon

Oxides of sulphur

None of the above

SO₂and NO₂produce pollution by increasing

Choose an answer

Alkalinity

Acidity

Neutrality

Buffer action

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

Choose an answer

Paper

Plastic

Hides of animals

Glass

In the atmosphere, O₂is about

Choose an answer

10%

15%

21%

25%

Pollutant of automobile exhausts that affects nervous system/produces mental diseases is

Choose an answer

Mercury

Lead

Nitrogen oxide

Sulphuric oxide

Eutrophication causes reduction in

Choose an answer

Dissolved hydrogen

Dissolved oxygen

Dissolved salts

All the above

The largest item which is recycled is

Choose an answer

Newspaper

Plastic

Aluminium

Oil

Which is not a component of environment

Choose an answer

Biosphere

Lithospahre

Hydrosphere

None of these

Ozone hole refers to

Choose an answer

Hole in ozone layers

Reduction in thickness of ozone layer in stratosphere

Reduction of thickness of ozone in troposphere

Increase concentration of ozone

Chlorofluorocarbon, CF₂CI₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

Choose an answer

Which factor is helping to reduce the environmental pollution

Choose an answer

Rapid growth of population

Urbanization

Industrialization

Increase of plantation

One of the environmental problem is the formation of oil slicks when oil is spilled from tankers in sea water. Which treatment is suitable to remove oil slicks

Choose an answer

Blow air

Add Na₂CO₃

Use a specially made sorbent having flouring trapped in it

Use a sorbent having Al₂O₃trapped in it

BOD is

Choose an answer

Biological oxygen deficit

Biosphere oxygen demand

Biological oxygen demand

None of the above

Atomospheric pollutant is

Choose an answer

CO₂

CO

O₂

N₂

Which one is the major reason for pollution in high cities?

Choose an answer

Fossil fuel

Acid rain

Heat dispersion

None of the above

In incinerating the waste is burnt at

Choose an answer

1000°C

100°C

2000°C

1500°C

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

Choose an answer

Pb

Cr

Hg

All of these

Ozone layer of stratosphere requires protection from indiscriminate use of

Choose an answer

Fungicides, insecticides, bactericides and medicines

Aerosols and high flying jets

Atomic explosions and industrial wastes

Baloons and turbo-prop aeroplanes

Carbon monoxide is harmful to human beings as it

Choose an answer

Is carcinogenic

Is antagonistic to CO₂

Has higher affinity for hemoglobin as compared to oxygen

Is destructive to O₃

The % of CO₂is the atmosphere is

Choose an answer

3.0%

0.03%

0.3%

0.5%

Polycyolic aromatic hydrocarbons are taught to be

Choose an answer

Disinfectant

Carcinogenic

Helpful

Reactive

A single chlorine free radical can destroy how many ozone molecules

Choose an answer

100

100000

10000

10

Atmosphere of big/metropolitan cities is polluted most by

Choose an answer

Automobile exhausts

Pesticide residue

Household waste

Radio-active fall out

Cyclone collector is used for minimizing

Choose an answer

Radioactive pollution

Air pollution

Noise pollution

Water pollution

More Classes

Other Links

ECAT Chemistry Chapter 27 Environmental Chemistry Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer