Question # 1

Natural water is

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Pure

Impure

Acts as solute

Distilled

Acid rain is caused when various atmospheric gases dissolve in rain water. What are the gases that cause rain water

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SO₂

NO₂

CO

a and b only

A large hole in the ozone layer over antarctica region was discovered in:

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1960s

1970s

1980s

1990s

Chemicals used to kill herbs are:

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Herbicides

Insecticides

Pesticides

Fungicides

Water bodies are included in:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Rigid rocky crust earth upto a depth of 100 km is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

The scope of environmental chemistry is to study:

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Source of chemicals

Transportation of chemicals

Transportation of toxic chemical

All of these

BOD is the oxygen demand with in day(s):

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Four

Two

Three

Five

Ecosystem is a smaller unity of

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Nydosphere

Biosphere

Lithosphere

Attmosphere

Sea gets polluted bu accidental oil spills and

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Atmospheric pressure

Nitrogen gas

Cargo oil tankers

Aero plane

It is a biodegradable pollutant

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Salts of HG

DDt

Aluminum foil

Domestic fuel

Photo chemical smog contains ______ as main reactants

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Nitrons oxide and unburnt hydrocarbons

Nilric oxide and unburnt hydrocarbons

No and burnt hydrocarbons

N₂O and burnt hydrocarbons

Atmosphere consists of gasses:

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N₂

O₂

Ar

All

The largest item which is recycled is

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newspaper

plastic

aluminium

oil

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)

Water is purified by the process:

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Aeration

Coagulation

Chlorination

All of these

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

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Sufficient NO

Sunlight

Less movement of air

Winds

Which one is more toxic?

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Fe

C

Hg

Ag

Coal contains percentage of sulphur:

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1-9%

5-9%

6-9%

7-9%

Oceans, rivers, streams, leaks, polar ice caps, glaciers and group water reservoirs are included in

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Atmosphere

Lithosphere

Hydrosphere

Biosphere

The branch of chemistry interlinked with biology, physics, medicines, agriculture, public health and sanitary engineering etc. is:

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Biochemistry

Physical chemistry

Pharmaceutical chemistry

Environmental chemistry

Reason of pollution are:

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Population and urbanization

Transportation

Industrialization

All of these

Chromium (VI) is highly toxic and can cause

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Blindness

Cancer

Liver problems

Blood problems

Insoluble ferric oxide is produced in the pH range:

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1 to 8

6 to 9

3 to 13

8 to 13

Volcanoes produce SO₂:

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47%

57%

67%

77%

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

Coagulation removes suspended particles in ran water:

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60%

70%

80%

90%

How many times a newspaper can be recycled

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02

05

08

10

Ozone is usually produced in the

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South polar region

North pole region

Tropical region

Thermosphere zone

Polycyclic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

In addition to many pollutants present in ground water, a successful study was conducted to remove a highly Toxic chemical.What chemical is this

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Cobalt

Nickel

Arsenic

Sulphur

The overall effect of the photochemical smog in the after noon is built up of

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Neutralization

oxidizing agent

Reducing agent

Activating agent

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

Which 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

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

Region of earth capable of supporting life is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Many petroleum products are:

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coloured

colourless

testy

poisoinous

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

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COD

BOD

DO

Available chlorine

Agriculture consumes part of fresh water:

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1%

2%

69%

23%

What is component of environment?

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Atmosphere

Hydrosphere

Lithosphere

All of these

Which of the following is a macronutrient?

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Boron

Iron

Copper

Carbon

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

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

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Pb

Cr

Hg

All of these

Which is unnecessary for purification of water for drinking purposes

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Coagulation

Aeration

Treatment with Iodine

Treatment with chlorine

Lithosphere has amount of silicon

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35.30%

27.72%

40.01%

21.13%

Part of fresh water consumed in industry is:

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1%

2%

69%

23%

Coagulation in the purification of water is carried out by

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Alum

NiSO₄

BaSO₄

CuSO₄

SO₂and NO₂cause pollution due to increase in

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Buffer action

Basicity

Acidity

Neutrality

Property due to which water acts as a universal solvent is

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Polarity

It's ability to make hydrogen bond

Both A and B

Strong dipole dipole interaction

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

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0.1

1.3

2

3

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

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AI

Hg

As

Cr(vi)

In Purification of potable water the coagulant used is

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nickel sulpahte

copper sulpahte

barium sulphate

alum

Smaller unit of biosphere is:

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specie

ecosystem

plankton

troposphere

a hole used to dump the municipal wastes is called:

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landfill

effluents

leachate

inclneration

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

The % of CO₂in the atmosphere is

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3.0%

0.03%

0.3%

0.5%

Ecology is a science of environment and deals specially with

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stratosphere

biosphere

lithosphere

hydrosphere

Major cause of SO2 on global scale is

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Volcanoes

Electric sparks

Combustion

All