Environmental Chemistry Test

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Environmental Chemistry Test - 2

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Weekly Quiz Competition

Question 1
1 / -0

The pollutant capable of combining with haemoglobin is

A
CO

B
CO₂

C
SO₂

D
NO

Solution

The life threatening effects of carbon monoxide arise from its reversible combination with haemoglobin (Hb) in red blood cells, which causes displacement of oxygen. This results in oxygen starvation or anoxia.
Question 2
1 / -0

Soil salinity can be measured by

A
potentiometer

B
calorimeter

C
conductivity meter

D
None of these

Solution

Soil salinity can be measured by conductivity meter.
Question 3
1 / -0

Which of the following conditions show the polluted environment?

a. pH of rain water = 5.6
b. Eutrophication
c. Biochemical oxygen demand = 10 ppm
d. Amount of carbon dioxide in the atmosphere = 0.03%

A
a and c

B
b and c

C
c and d

D
d and a

Solution

Clean water has BOD value less than 5 ppm. The BOD value more than 5 ppm indicates the polluted water. The excessive growth of algae and aquatic plants due to the presence of plant nutrients is called eutrophication. The decomposition of these aquatic plants utilises the dissolved oxygen, which proves fatal for aquatic animals.
Question 4
1 / -0

Which of the following statements regarding photochemical smog is not correct?

A
Carbon monoxide does not play any role in photochemical smog formation.

B
Photochemical smog is an oxidizing agent in character.

C
Photochemical smog is formed through photochemical reaction involving solar energy.

D
Photochemical smog does not cause irritation in eyes and throat.

Solution

Photochemical smog causes irritation in eyes and throat.
Question 5
1 / -0

The gaseous pollutant formed due to incomplete combustion of fuel is

A
carbon monoxide

B
carbon dioxide

C
sulphur dioxide

D
hydrogen sulphide

Solution

Incomplete combustion occurs when the supply of air or oxygen is poor. Water is still produced, but carbon monoxide and carbon are produced instead of carbon dioxide. Carbon is released as soot. Carbon monoxide is a poisonous gas, colourless and odourless gas which combines with haemoglobin in blood,thus depriving the cell of oxygen.
Question 6
1 / -0

The smog is essentially caused by the presence of

A
oxygen and ozone

B
oxygen and nitrogen

C
ozone and nitrogen

D
oxides of sulphur and nitrogen

Solution

The smog is essentially caused by the presence of oxides of sulphur and nitrogen. This kind of visible air pollution is composed of nitrogen oxides, sulphur oxides, ozone, smoke, and other particulates.
Question 7
1 / -0

Pollutant-consuming organisms are known as

A
particulates

B
receptors

C
sinks

D
hydrocarbons

Solution

The elements or organisms that can consume a pollutant are known as 'sinks'. Recent researches have shown that soil is capable of removing large amounts of CO from the atmosphere by the action of some soil microorganisms. The microorganisms act as a sink for CO.
Question 8
1 / -0

What would be the approximate pH of rainwater due to the presence of H⁺ ions formed by the reaction of rainwater with CO₂ present in the atmosphere?

A
13.5

B
5.6

C
1.5

D
10.5

Solution

The pH of rainwater due to the presence of H⁺ ions formed by the reaction of rainwater with CO₂ present in atmosphere would be ~ 5.6.
Question 9
1 / -0

Carbon monoxide, a highly poisonous gas, reacts with blood to form

A
oxy-haemoglobin

B
carboxyhaemoglobin

C
nitro-haemoglobin

D
carbon dioxide haemoglobin

Solution

Carboxyhemoglobin or carboxyhaemoglobin (symbol COHb or HbCO) is a stable complex of carbon monoxide and hemoglobin (Hb) that forms in red blood cells upon contact with carbon monoxide (CO). Exposure to small concentrations of CO hinder the ability of Hb to deliver oxygen to the body, because carboxyhemoglobin forms more readily than does oxyhemoglobin (HbO₂).
Question 10
1 / -0

Which of the following is/are not the component(s) of photochemical smog?

A
Unsaturated hydrocarbons

B
Nitrogen dioxide

C
Ozone

D
Sulphur dioxide

Solution

Photochemical smog is mainly composed of ozone, nitrogen dioxide and volatile organic compounds.
Sulphur dioxide is not a component of photochemical smog. It causes classical fog.

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Environmental Chemistry Test - 2

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Environmental Chemistry Test - 2

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Question 1

CO

CO2

SO2

NO

Solution

Question 2

potentiometer

calorimeter

conductivity meter

None of these

Solution

Question 3

a and c

b and c

c and d

d and a

Solution

Question 4

Carbon monoxide does not play any role in photochemical smog formation.

Photochemical smog is an oxidizing agent in character.

Photochemical smog is formed through photochemical reaction involving solar energy.

Photochemical smog does not cause irritation in eyes and throat.

Solution

Question 5

carbon monoxide

carbon dioxide

sulphur dioxide

hydrogen sulphide

Solution

Question 6

oxygen and ozone

oxygen and nitrogen

ozone and nitrogen

oxides of sulphur and nitrogen

Solution

Question 7

particulates

receptors

sinks

hydrocarbons

Solution

Question 8

13.5

5.6

1.5

10.5

Solution

Question 9

oxy-haemoglobin

carboxyhaemoglobin

nitro-haemoglobin

carbon dioxide haemoglobin

Solution

Question 10

Unsaturated hydrocarbons

Nitrogen dioxide

Ozone

Sulphur dioxide

Solution

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CO₂

SO₂