Question # 1

Fresh water of total earth water is:

Choose an answer

1%

2%

3%

4%

Insoluble ferric oxide is produced in the pH range:

Choose an answer

1 to 8

6 to 9

3 to 13

8 to 13

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

Choose an answer

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

Major cause of SO2 on global scale is

Choose an answer

Volcanoes

Electric sparks

Combustion

All

Ozone in most of the tropical regions acts as a pollutant and cause

Choose an answer

damages to eyes

aggravates asthma

chest discomfort

all of these

Which is property of CO?

Choose an answer

Soluble in water

Insoluble in water

No toxic

Pole coloured

A pollutant affects

Choose an answer

Human affects

Quality of life

Functioning of ecosystem

All of these

The water is considered to be polluted when the concentration of oxygen in it is

Choose an answer

6 - 9ppm

6 ppm

8 ppm

Less than 4pm

How much quantity of total water is available as fresh water

Choose an answer

3%

1%

10%

21%

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

Choose an answer

50,000

10,000

20,000

None of these

Chemicals used to kill fungi are:

Choose an answer

Herbicides

Insecticides

Pesticides

fungicides

0.1M HCI having pH =1.0 it is about 100 time stronger than acetic acid what will be the pH of acetic acid:

Choose an answer

0.1

1.3

2

3

Global warming is mainly caused by ______ radiations

Choose an answer

UV

I.R

gama

X-rays

Ecosystem is a smaller unity of

Choose an answer

Nydosphere

Biosphere

Lithosphere

Attmosphere

Nitrogen percentage in atmosphere is:

Choose an answer

76%

77%

78%

79%

Chemistry related to the study of environment affected by the chemicals and pollutants is called:

Choose an answer

Biochemistry

Physically chemistry

Pharmaceutical chemistry

Environmental chemistry

The pH range of acid rain is?

Choose an answer

7-6.5

6.5-6

6-5.6

Less than 5

Coal contains percentage of sulphur:

Choose an answer

1-9%

5-9%

6-9%

7-9%

The bonding occurs among polar covalent molecules containing H and one of the small electronegative element such as O,F or N is called:

Choose an answer

Ionic bonding

Metallic bonding

Bridge bonding

H-bonding

The gases in the atmosphere are essential for sustaining life on earth. Thus oxygen is required for breathing. What for is carbon dioxide required

Choose an answer

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

Chemicals used to kill insects are:

Choose an answer

Herbicides

Insecticides

Pesticides

Fungicides

Which of the following factors is not used to determine the quality of water

Choose an answer

COD

BOD

DO

Available chlorine

Chromium (VI) is highly toxic and can cause

Choose an answer

Blindness

Cancer

Liver problems

Blood problems

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

Choose an answer

Homogeneous

Heterogeneous

Dynamic

Static

Which is not an air pollutant

Choose an answer

N₂

CO

NO

N₂O

The pH range of acid rain is?

Choose an answer

7-6.5

6.5-6

6-5.6

Less than 5

Which is not considered as pollutant

Choose an answer

O₃

CO₂

NO₂

SO₂

Which one of the following does not act as pollutant

Choose an answer

Carbon monoxide

Sulphur dioxide

Hydrocarbons

Carbon dioxide

Chlorination of water is effective for

Choose an answer

Killing pathogens

Removing dust

Removing hardness

Increasing oxygen content

As the number of carbon atoms increase the number of isomers also increase. The six carbon compound hexane has as many as:

Choose an answer

10 isomers

3 isomers

5 isomers

6 isomers

The most important pesticides are:

Choose an answer

Herbicides

Insecticides

Fungicides

All

Ozone acts as:

Choose an answer

Pollutant

saver

oxidatant

All of these

The main pollution of leather tanneries in the waste is due to the salt of

Choose an answer

Chromium

Copper

Chromium

Lead

Which heavy metals do not have any safe limits

Choose an answer

As

Hg

Cr

All of these

In purification of potable water the coagulant used is:

Choose an answer

Nickel sulphate

Copper sulphate

Barium sulphate

Aluminium sulphate

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

Choose an answer

diffusion

convection

electrophoresis

chromatography

Requirement of macronutrient per acre of the land is

Choose an answer

5 to 200 kg

20-200 kg

200-400 kg

30-400 kg

Ozone is effectively removed by

Choose an answer

TNT

CFCs

PVC

CNG

Which of the following is not the required condition for the formation of smog

Choose an answer

Sufficient NO

Sunlight

Less movement of air

Winds

Water exist in only

Choose an answer

One state

Two state

Three states

4 states

The scope of environmental chemistry is to study:

Choose an answer

Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

Factors affecting quality of water:

Choose an answer

D.O

BOD

COD

a,b,c

Hydrosphere covers the surface of erath:

Choose an answer

70.8%

71.8%

72.8%

73.8%

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

Choose an answer

Solid waste management

Waste management

Solid management

Semisolid management

Why a C- C bond breaks by uv light

Choose an answer

Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

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

Choose an answer

Rain

Live stock waste

Oil leaks and spills

Disposal of industrial effluents

Hydrosphere includes

Choose an answer

Seas and rivers

Ocean & polar ice caps

Ground water

All of above

Lead pollution is mainly due to

Choose an answer

Metallic pollution

Space pollution

Acid rain

Cd pollution

Fungicides are the pesticides which:

Choose an answer

Control the growth of fungus

Kills insects

Kills plants

Kill herb

Detergent greatly effects the

Choose an answer

Aquatic life

Modern life

Terrestrial life

Plants life

Sulphate aerosols cause severe respiratory problems particularly among

Choose an answer

Infants

Women

Young people

Old people

The main pollutant of leather in the waste water is due to the salt of:

Choose an answer

Lead

Chromium (VI)

Copper

Chromium (III)

Why a C - Cl bond breaks by uv light

Choose an answer

Cl is most electronegative

Cl is volatile

C - Cl bond energy is smaller than that of C - H bond energy

Uv light provides energy which is sufficient to break C - Cl bond and not C - H bond

Choose the correct statements

Choose an answer

SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

Water is made disinfectant during purification of water to the step:

Choose an answer

aeration

coagulation

chlorination

treatment

Carbon Monoxide is:

Choose an answer

colouriess

orderless

high toxic

All of these

99.5% mass of lithosphere is made of

Choose an answer

03 elements

8 elements

11 elements

15 elements

Ph of unpolluted rain water is

Choose an answer

07

Less than 6

5.6

Less than 5

Components of environment is (in km) around the earth:

Choose an answer

10 km

100 km

1000 km

1500 km