Question # 1

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

Choose an answer

2 - 4 ppm

4 - 6 ppm

2 - 5 ppm

4 - 8 ppm

Forms of waste products:

Choose an answer

Heat

Smoke

Solid

All of these

Which is the following is true about galvanic cell:

Choose an answer

Reduction occurs at cathode

Reduction occurs at anode

Anode is negatively charged

Chathode is positively charged

Most harmful of biosphere is

Choose an answer

Deforestation

Nuclear fail out

Salinity

Water logging

Volcanoes produce SO₂:

Choose an answer

47%

57%

67%

77%

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

Choose an answer

reduction

Aeration

Electrolysis

Co-angulation

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

Choose an answer

It attaches to sulphur of the disulphide link

Hg is a heavy metal

Hg is liquid at room temperature

Hg is non reactive chemically

Contaminated soil can be cleaned by various methods. Which method is not used to clean the soil

Choose an answer

diffusion

convection

electrophoresis

chromatography

Hydrosphere includes

Choose an answer

Seas and rivers

Ocean & polar ice caps

Ground water

All of above

Coagulation in the purification of water is carried out by

Choose an answer

Alum

NiSO₄

BaSO₄

CuSO₄

The pH of the rain water in areas where acid rain is the cause of pollution may be

Choose an answer

6.5

5.6

4.5

2.2

Splitting of spectral lines when atoms are subjected to strong electric field is called:

Choose an answer

Compton effect

Stark effect

Zeeman effect

Photoelectric effect

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

Choose an answer

live stock waste

oil leaks and spills

disposal of industrial effluents

rain

The temperature in the incineration process has a range:

Choose an answer

900 to 1000°C

650 to 1100°C

950 to 1300°C

500 to 900°C

CFCs destroy ozone layer. How many ozone molecule a chlorine free radical can destroy

Choose an answer

10,000

20,000

100,000

50,000

Which gas produces air pollution?

Choose an answer

oxides of sulphur

oxides of carbon

all of these

Ozone is effectively removed by

Choose an answer

TNT

CFCs

PVC

CNG

The rigid rocky part of earth crust called lithosphere extends upto a depth of:

Choose an answer

10 km

100 km

1000 km

1500 km

Leaching of nutrients is due to

Choose an answer

Drying of soil

Combustion of soil

Acidification of soil

Neutralization of soil

A single chloride free radical of CFCs can destroy upto ozone molecules:

Choose an answer

10

100

1000

100000

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

Choose an answer

Ionic character of the compounds

The first ionization energy

The basic character of the oxides

The stability of +2 oxidation

More Classes

Other Links

MDCAT Chemistry Chapter 21 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