Environmental Chemistry Test

Result

Environmental Chemistry Test - 71

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

Ozone layer depletion is caused by

A
AFC's

B
BFC's

C
CFC's

D
DFC's

Solution
Question 2
1 / -0

Study the following statements regarding acid rain and select the incorrect ones.

(i) Acid rain refers to the rainfall and other forms of precipitation with a pH of less than 5.
(ii) Oxides of sulphur and nitrogen are released from automobile exhausts, industries, power plants, etc.
(iii) These oxides of sulphur and nitrogen, may react with water in the air and form sulphuric acid $$ \left( { H }_{ 2 }{ SO }_{ 4 } \right) $$ and nitric acid $$ \left( { HNO }_{ 3 } \right) $$
(iv) Acid rain has harmful effects on animals and human beings but no characteristic impact on plants.

A
(i) and (iii)

B
(iii) and (iv)

C
(iv) only

D
(ii) only

Solution

Acid rain damages plants by direct effect on foliage and growing point-chlorosis, necrosis, defoliation, dieback. It causes leaching of essential minerals of soil.
Question 3
1 / -0

When there is depletion of ozone in the stratosphere the wavelength of radiation striking the earth's surface will be ............

A
$$10^{-2}$$ m

B
$$10^{-7}$$ m

C
$$10^{-10}$$ m

D
100 m
Question 4
1 / -0

Soil is a natural medium for growth of land plants. Organic soil contains organic number upto a depth of

A
Two and a half feet

B
One foot

C
Six inches

D
Ten feet

Solution

Organic soil contain organic number upto a depth of two and half feet, this is also known as human or upper layer of soil.

Question 5

1 / -0

Match the column I with column II and mark the appropriate choice

Column I	Column II
(A) Troposphere	(i) Prevents UV rays coming to earth
(B) Stratosphere	(ii) Ionization of gases
(C) Mesosphere	(iii) Maintenance of heat balance
(D) Thermosphere	(iv) Non-propagation of sound waves

$$(A)\rightarrow (i),(B)\rightarrow (iv),(C)\rightarrow (iii),(D)\rightarrow (i)$$

$$(A)\rightarrow (iv),(B)\rightarrow (ii),(C)\rightarrow (i),(D)\rightarrow (iii)$$

$$(A)\rightarrow (iii),(B)\rightarrow (i),(C)\rightarrow (iv),(D)\rightarrow (ii)$$

$$(A)\rightarrow (i),(B)\rightarrow (iii),(C)\rightarrow (ii),(D)\rightarrow (iv)$$

Solution

(A) The troposphere is the thickest layer of the Earth's atmosphere containing half of the Earth's atmosphere, weather occurs in this layer, so this layer maintains the balance of heat.

(B) Stratosphere contains the Ozone layer which prevents the incoming UV rays in the Earth.

(C) The mesosphere is the layer where the meteors or rock fragments turn up and this layer becomes too thin to carry sound waves.

(D) In Thermosphere, UV radiation causes photoionization/ photodissociation of molecules; creating ions in the ionosphere.

Question 6
1 / -0

Match the column I with column II and mark the appropriate choice.
Column I Column II
(A) Peroxyacetyl nitrate (i) Global warming
(B) Polychlorinated biphenyls (ii) Photochemical smog
(C) Dioxides of carbon and sulphur (iii) Water pollutant
(D) IR active molecules (iv) Acid rain

A
(A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (i)

B
(A) $$\rightarrow$$ (iii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (i)

C
(A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (iii), (D) $$\rightarrow$$ (i)

D
(A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iv)

Solution

Peroxyacetyl nitrate is a secondary pollutant since they form in the atmosphere after the emission of primary pollutants. It is present in photochemical smog.

Surface water getting contaminated with PCB waste generally has high levels of PCBs in sediment, as the PCBs attach to organic matter. PCBs can be slowly released from the sediment into the water and evaporate into the air.

Sulfur dioxide another toxic chemical gas when combines with water and air, forms sulfuric acid, which is the main component of acid rain. Carbon dioxide in the air can dissolve in rainwater to form carbonic acid, $$H_{2}CO_{3}$$ and contributes to acid rain.

IR active molecules in the atmosphere can increase their vibrational energy by absorbing some of this infrared light, and thus increasing the temperature of the atmosphere resulting in Global warming.

The correct option is A.

Question 7

1 / -0

Match the column I with column II and mark the appropriate choice.

	Column I (Pollutants)		Column II (Source)
(a)	Toxic heavy metals	(i)	Domestic sewage
(b)	Microorganisms	(ii)	Industries and chemical factories
(c)	Organic wastes	(iii)	Chemical fertilizers
(d)	Plant nutrients	(iv)	Discharge from food processing factories

(a) $$\rightarrow$$ (i), (b) $$\rightarrow$$ (iii), (c) $$\rightarrow$$ (ii), (d) $$\rightarrow$$ (iv)

(a) $$\rightarrow$$ (iii), (b) $$\rightarrow$$ (iv), (c) $$\rightarrow$$ (i), (d) $$\rightarrow$$ (ii)

(a) $$\rightarrow$$ (iv), (b) $$\rightarrow$$ (ii), (c) $$\rightarrow$$ (iii), (d) $$\rightarrow$$ (i)

(a) $$\rightarrow$$ (ii), (b) $$\rightarrow$$ (i), (c) $$\rightarrow$$ (iv), (d) $$\rightarrow$$ (iii)

Solution

a) Toxic heavy metals are released from the industries and chemical factories lead to environmental pollution. $$\Rightarrow (ii)$$

b) Microorganisms play an important role in sewage treatment. $$\Rightarrow (ii)$$

c) Food processing waste is fresh organic material, is difficult to treat. $$\Rightarrow (ii)$$

d) Chemical fertilizers supply nutrients to plants. $$\Rightarrow (iii)$$

Hence, option D is correct.

Question 8
1 / -0

Mark the example which in not correctly matched?

A
Air pollutants - Oxides of sulphur, nitrogen and carbon

B
Particulate pollutants - Dust, mist fumes

C
Global warming - Methane, ozone, CFCs

D
Water soluble chemical pollutants - Oxides of nitrogen, carbon and sodium

Solution

Water-soluble pollutants are detergents, fertilizers, oils from factories and industries, ammonical nitrogen etc. Whereas oxides of nitrogen, carbon, and sodium are air pollutants that cause gaseous pollution.
Question 9
1 / -0

Ozone layer of upper atmosphere is being destroyed by

A
Chlorofluorocarbons

B
$$ { SO }_{ 2 } $$

C
Smog

D
None of the above

Solution

$$ { CFC }_{ s } $$ are widely used as refrigerants. $$ { CFC }_{ s } $$ discharged in the lower part of atmosphere move upward and reach stratosphere. In stratosphere, UV rays act on them releasing CI atoms. CI degrades ozone releasing molecular oxygen, with these atoms acting merely as catalysts; CI atoms are not consumed in the reaction. $$ { CFC }_{ s } $$ added to the stratosphere have permanent and continuing affects on ozone levels.
So, the correct answer is 'Chlorofluorocarbons'.
Question 10
1 / -0

Acid rains are produced by

A
Excess $$ { NO }_{ x } $$ and $$ { SO }_{ 2 } from burning fossil fuels

B
Excess production of $$ { NH }_{ 3 } $$ by industries and power plants

C
Excess release of carbon monoxide by incomplete combustion of fossil fuels

D
Excess release of $$ { CO }_{ 2 } $$ by combustion and animal respiration.

Solution

Acid rain is caused by large-scale emission of acidic gases into the atmosphere from thermal power plants, industries, and automobiles. The common ones are sulfur dioxide, nitrogen oxides NOx, volatile organic carbons VOCs and hydrogen chloride. NOx is also produced in the atmosphere through lightning. Sulfur dioxide and nitrogen oxides are changed in the atmosphere into sulphuric acid and nitric acid by combining with oxygen and water.
So, the correct answer is 'Excess NOx and $$ { SO }_{ 2 } from burning fossil fuels'.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

	Column I		Column II
(A)	Peroxyacetyl nitrate	(i)	Global warming
(B)	Polychlorinated biphenyls	(ii)	Photochemical smog
(C)	Dioxides of carbon and sulphur	(iii)	Water pollutant
(D)	IR active molecules	(iv)	Acid rain

Environmental Chemistry Test - 71

Result

Environmental Chemistry Test - 71

Score

-

Rank

-

SHARING IS CARING

Question 1

AFC's

BFC's

CFC's

DFC's

Solution

Question 2

(i) and (iii)

(iii) and (iv)

(iv) only

(ii) only

Solution

Question 3

$$10^{-2}$$ m

$$10^{-7}$$ m

$$10^{-10}$$ m

100 m

Question 4

Two and a half feet

One foot

Six inches

Ten feet

Solution

Question 5

$$(A)\rightarrow (i),(B)\rightarrow (iv),(C)\rightarrow (iii),(D)\rightarrow (i)$$

$$(A)\rightarrow (iv),(B)\rightarrow (ii),(C)\rightarrow (i),(D)\rightarrow (iii)$$

$$(A)\rightarrow (iii),(B)\rightarrow (i),(C)\rightarrow (iv),(D)\rightarrow (ii)$$

$$(A)\rightarrow (i),(B)\rightarrow (iii),(C)\rightarrow (ii),(D)\rightarrow (iv)$$

Solution

Question 6

(A) $$\rightarrow$$ (ii), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (iv), (D) $$\rightarrow$$ (i)

(A) $$\rightarrow$$ (iii), (B) $$\rightarrow$$ (iv), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (i)

(A) $$\rightarrow$$ (iv), (B) $$\rightarrow$$ (ii), (C) $$\rightarrow$$ (iii), (D) $$\rightarrow$$ (i)

(A) $$\rightarrow$$ (i), (B) $$\rightarrow$$ (iii), (C) $$\rightarrow$$ (ii), (D) $$\rightarrow$$ (iv)

Solution

Question 7

(a) $$\rightarrow$$ (i), (b) $$\rightarrow$$ (iii), (c) $$\rightarrow$$ (ii), (d) $$\rightarrow$$ (iv)

(a) $$\rightarrow$$ (iii), (b) $$\rightarrow$$ (iv), (c) $$\rightarrow$$ (i), (d) $$\rightarrow$$ (ii)

(a) $$\rightarrow$$ (iv), (b) $$\rightarrow$$ (ii), (c) $$\rightarrow$$ (iii), (d) $$\rightarrow$$ (i)

(a) $$\rightarrow$$ (ii), (b) $$\rightarrow$$ (i), (c) $$\rightarrow$$ (iv), (d) $$\rightarrow$$ (iii)

Solution

Question 8

Air pollutants - Oxides of sulphur, nitrogen and carbon

Particulate pollutants - Dust, mist fumes

Global warming - Methane, ozone, CFCs

Water soluble chemical pollutants - Oxides of nitrogen, carbon and sodium

Solution

Question 9

Chlorofluorocarbons

$$ { SO }_{ 2 } $$

Smog

None of the above

Solution

Question 10

Excess $$ { NO }_{ x } $$ and $$ { SO }_{ 2 } from burning fossil fuels

Excess production of $$ { NH }_{ 3 } $$ by industries and power plants

Excess release of carbon monoxide by incomplete combustion of fossil fuels

Excess release of $$ { CO }_{ 2 } $$ by combustion and animal respiration.

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.