Question # 1

The 95.5% mass of Lithoshone is made of 11 elements i,e O₂, Si, Al, Fe, Ca, Na, K, Mg, Ti, H₂and P. Which element is present in trace amount

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iodine

bromine

lead

carbon

Out of total amount of water available for human use is

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0.30%

0.2%

40%

50%

Lanthanides an actinides belong to following group of periodic table:

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IB

VIIIB

IIB

IIIB

Cyclone collector is used to reduce

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Noise pollution

Air pollution

Water pollution

Radioactive pollution

The pH range of acid rain is?

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7-6.5

6.5-6

6-5.6

Less than 5

In purification of potable water the coagulant used is:

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Nickel sulphate

Copper sulphate

Barium sulphate

Aluminium sulphate

The temperature in the incineration of industrial and hazardons waster process had a range

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950 to 1300°C

500 to 900°C

250 to 500°C

900 to 1000°C

Chemicals used to kill herbs are:

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Herbicides

Insecticides

Pesticides

Fungicides

Nitrogen percentage in atmosphere is:

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76%

77%

78%

79%

Lithosphere extends upto kilometer of earth crust in depth:

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10 km

100 km

1000 km

10000 km

The yellow color present in the photo chemical smog is due to presence of the

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Carbon dioxide

Nitrogen dioxide

Chlorine

All

Chemicals used to kill insects are:

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Herbicides

Insecticides

Pesticides

Fungicides

Fungicides are the pesticides which:

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Control the growth of fungus

Kills insects

Kills plants

Kill herb

It is a biodegradable pollutant

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Salts of HG

DDt

Aluminum foil

Domestic fuel

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

Many petroleum products are:

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coloured

colourless

testy

poisoinous

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

Polycyclic aromatic hydrocarbons are taught to be

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Disinfectant

Carcinogenic

Helpful

Reactive

Ground and surface waters are contaminated and become polluted due to the human activity. Which human activity will not cause water pollution

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live stock waste

agricultural pesticides

oil beaks and spills

all of the above

A pollutant affects

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Human affects

Quality of life

Functioning of ecosystem

All of these

Ozone layer is high:

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20-23 km

22-25 km

23-26 km

25-28 km

Choose the correct statements

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SO₂affects the nucleus

SO₂affects plasmodesmata

SO₂affects cell wall

SO₂affects all membrane systems

Any substance in the environment which adversely affects the human health and natural functioning of the Ecosystem is known as

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environment

hydrosphere

pollutant

biosphere

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

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10 km

100 km

1000 km

1500 km

Nitrogen in the atmosphere is:

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78%

21%

0.9%

0.03%

What is the effect of polluted air on environment

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Ozone

Acid rain

Global warming

Smog

The normal amount of overhead ozone is about

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250 Du

300 DU

350 DU

400 DU

Ozone is usually produced in the

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South polar region

North pole region

Tropical region

Thermosphere zone

Which of the following is not a heavy industry?

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Iron

Fertilize

Paper

None

HOCl is a compound:

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Polor inorganic

organic

Ionic

covalant

Which heavy metals do not have any safe limits

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As

Hg

Cr

All of these

During incineration temperature range of non-rotating chamber is

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900-1000C°

650-1100C°

950-1300C°

700-900C°

Heat balance of earth is maintained by

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Atmosphere

Hydrosphere

Lithosphere

Stratosphere

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

Coal contains percentage of sulphur:

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1-9%

5-9%

6-9%

7-9%

SO₂and NO₂cause pollution due to increase in

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Buffer action

Basicity

Acidity

Neutrality

Hydrosphere covers the surface of erath:

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70.8%

71.8%

72.8%

73.8%

The normal amount of overhead ozone is

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350 DU

450 DU

400 DU

300 DU

The Catalyst used in the contact tower for the manufacture of H₂SO₄ is easily poisoned by:

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Nitrous oxide

Nitrogen gas

Arsenic oxide

Carbon dioxide

Factors affecting quality of water:

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D.O

BOD

COD

a,b,c

The process of coagulation can remove suspended solids in raw water about

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50%

60%

Less than 40%

More than 80%

Chemical like Al₂(SO₄) or alum are used in purification of water druing step:

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aeration

coagulation

chlorination

treatment

Commonly used coagulants are ions of:

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Ferrous

Al

Cr

Ferric

Materials suspended in water or present as colloidal form in raw water are removed by:

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aeration

coagulation

chlorination

treatment

The destructive distillation of coal gives three products. which of following is not the product of destructive distillation of coal?

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Coal tar

CO₂

Coal gas

Coke

Main cause of reducing map is:

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Combustion of coal

NO and NO₂

Un-burnt hydrocarbons

All of these

Eleven elements made part of earth mass:

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97.5%

98.5%

99.5%

100%

Coal contains sulphur in it:

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1-3%

1-6%

1-9%

1-12%

Chlorofluorocarbon, CF₂Cl₂, plays an effective role in removing O₃(ozone) in the stratosphere. Which reaction does not cause the depletion of ozone

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Biochemical oxygen demand is the capacity of organic matter in natural water to consume oxygen

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2 days

5 days

6 days

7 days

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

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Homogeneous

Heterogeneous

Dynamic

Static

Why is carbon monoxide called as pollutant? The reason is that

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It combines with oxygen

It combines with haemoglobin

It inactivates glycolysis

It inactivates nerves

The smog having high contents of SO₂is

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Neutral smog

Reducing smog

Oxidizing smog

Artificial smog

Which one of the pollutants of automobile exhausts affects the nervous system or produces mental diseases

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NO₂

SO₂

Hg

Pb

The temperature of in the incineration of industrial and hazardous waste process has range

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900 - 1000°C

250 - 500°C

950 - 1300°C

500 - 900°C

Ecosystem is a smaller unity of

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Nydosphere

Biosphere

Lithosphere

Attmosphere

Region of earth capable of supporting life is called:

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Atmosphere

Hydrosphere

Lithosphere

All of these

Alkali metals react viotlently with halogens:

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Halides

Anhydrides

Hydrides

None of the above

A single free chlorine redical can destroy ozone molecules upto:

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100000

100

1000

10000