Tag: environmental impact: global warming

Questions Related to environmental impact: global warming

Greenhouse effect causes:

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. melting of ice caps

  2. rise in the sea level

  3. submerging of low lying areas

  4. All of the above

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Correct Option: A
Explanation:

The greenhouse effect causes the melting of the ice caps and releases other greenhouse gases, $CH _4$ which is heating up the environment and causing the greenhouse effect again. 

Option A is correct.

Global warming causes:
1) an increase in the sea level
2) the melting of ice at mountain peaks
3) a decrease in food production by plants

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. I only

  2. I and II only

  3. II and III only

  4. I, II and III

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Correct Option: D
Explanation:

The global warming effect causes the rise in the global temperature resulting in melting of polar ice caps and rise in sea level.This rise in temperature changes the rain cycle and it decreases the crop production.

The release of carbon dioxide into the air causes:

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. acid rain

  2. eutrophication

  3. global warming

  4. respiratory problems

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Correct Option: C
Explanation:

The trapping of infrared radiations from the atmosphere and not reflecting it back due to higher levels of Carbon dioxide as a major pollutant which traps radiations. This effect causes the rise in the global temperature resulting in melting of polar ice caps and rises in the sea level.

Gases referred as 'greenhouse gases' are:

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. $CO _2,\ O _2,\ NO _2,\ NH _3$

  2. chlorofluorocarbon, $CO _2,\ NH _3,\ N _2O$

  3. $CH _4,\ N _2,\ CO _2,\ NH _3$

  4. chlorofluorocarbon, $CO _2,\ CH _4,\ N _2O$

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Correct Option: D
Explanation:

The most significant greenhouse gases are water vapour (H$ _2$O), carbon dioxide (CO$ _2$), methane (CH$ _4$) and nitrous oxide (N$ _2$O). Chlorofluorocarbons (CFCs), once used as refrigerants and aerosol propellants until they were phased out by international agreement, are also greenhouse gases.

Cause:

Global warming
Effect:
Ice at North and South poles may melt causing sea-level to rise and floods to occur.

Which of the following can prevent the effect from happening?

biology air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. Deforestation

  2. Use of unleaded petrol

  3. Use of leaded petrol

  4. Both (A) & (B)

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Correct Option: B

Global warming is the result of the increase in ________ in air.

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. nitrogen

  2. oxygen

  3. water vapour

  4. carbon dioxide

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Correct Option: D
Explanation:

The $CO _2$ is a gas which traps heat and let to the glaciers to melt, which cause an increase in global warming.

Which of the following gases cause the harmful green house effect?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. Hydrogen

  2. Oxygen

  3. Carbon dioxide

  4. Nitrogen

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Correct Option: C
Explanation:

Gases which cause green house effect are:

$1.$ Water vapour $(H _2O)$
$2.$ Carbon dioxide $(CO _2)$
$3.$ Methane $(CH _4)$
$4.$ Nitrous oxide $(N _2O)$
$5.$ Chlorofluro carbon $(CFCs)$

Which of the following is not a green house gas?

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. Carbon dioxide

  2. Water vapour

  3. Oxygen

  4. Methane

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Correct Option: C
Explanation:

Green house gases (GHGs) are gaseous components of the atmosphere that contribute to the 'green house effect'. A greenhouse gas is any gaseous compound in the atmosphere that is capable of absorbing infrared radiation, thereby trapping and holding heat in the atmosphere. By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming. Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occurring greenhouse gases include water vapour, carbon dioxide, methane, nitrous oxide and ozone. Certain human activities, however, add to the levels of most of these naturally occurring gases.

Carbon dioxide is the major component of greenhouse gases.

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. True

  2. False

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Correct Option: B
Explanation:

There are several other gases like $H _2O, CH _4, N _2O, CFC _s$ and $CO$, are responsible for the greenhouse effect. 

Carbon dioxide is also component of greenhouse gases but it is not a major component.

Deforestation leads to an increase in the amount of $CO _2$ in the air:

chemistry air and water pollution control environmental impact: global warming green house effect geobiochemical cycle

  1. because the number of trees which consume $CO _2$ is increased

  2. because the number of trees which consume $CO _2$ is reduced

  3. because the number of trees which fix $CO _2$ is reduced

  4. None of the above

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Correct Option: B
Explanation:

Deforestation leads to an increase in the amount of $CO _2$ in the air because the number of trees which consume $CO _2$ is reduced.