Environmental Studies · General Awareness

Greenhouse Gases and Atmosphere

1,328 Questions

Review important questions related to greenhouse gases, global warming, and atmospheric changes. The practice set focuses on identifying major pollutants and their environmental impact. These concepts are tested in the general awareness and environmental studies sections.

Greenhouse gas identificationGlobal warming processAtmospheric carbon dioxideMethane emissionsCement production emissions

Greenhouse Gases and Atmosphere Questions

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

Which of the following is next to carbon dioxide for its contribution to global warming?

  1. $CFC$s
  2. $CO$

  3. Black carbon

  4. Ozone
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Black carbon is second only to carbon dioxide for its contribution to global warming. Chemically, black carbon or BC is a component of fine particulate matter. Black carbon consists of pure carbon in several linked forms. It is formed through the incomplete combustion of fossil fuels, biofuel, and biomass, and is emitted in both anthropogenic and naturally occurring soot.

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

Which of the following is a factor that affect the degree to which any greenhouse gas will influence global warming?

  1. Its abundance in the atmosphere.

  2. How long it stays in the atmosphere.

  3. Its global-warming potential.

  4. All of above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

By increasing the heat in the atmosphere, greenhouse gases are responsible for the greenhouse effect, which ultimately leads to global warming. Three factors affect the degree to which any greenhouse gas will influence global warming: its abundance in the atmosphere, how long it stays in the atmosphere and Its global-warming potential.

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

__________ used as refrigerants and aerosol propellants are also greenhouse gases.

  1. Perfluorocarbons

  2. Sulfur hexafluoride

  3. Chlorofluorocarbons (CFCs)

  4. None of above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chlorofluorocarbons (CFCs), once used as refrigerants and aerosol propellants until they were phased out by international agreement, are also greenhouse gases. They damage the ozone layer of the atmosphere. 

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

Greenhouse effect is a major cause of:

  1. global warming

  2. reduction of temperature

  3. acid rain

  4. all of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

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.

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

Which of the following is the natural sources of the most volatile hydrocarbon?

  1. Methane

  2. Ethane

  3. Ester

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Methane is a chemical compound with the chemical formula $C{ H } _{ 4 }$ (one atom of carbon and four atoms of hydrogen). It is a group 14 hydride and the simplest alkane, and is the main component of natural gas.In its natural state, methane is found both below ground and under the sea floor. When it finds its way to the surface and the atmosphere, it is known as atmospheric methane

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

Which chemical substance is a greenhouse gas that scientists link to global climate change?

  1. Nitrogen oxides

  2. Lead

  3. Carbon dioxide

  4. DDT

  5. Nitrates
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

Nitrous oxide $\displaystyle N _2O$ is a greenhouse gas scientists link to global climate change. Following are the sources of nitrous oxide.
(1) Fertilizer use
(2) Fossil fuel combustion
(3) Biomass burning
(4) Changing land use

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

The gas that is not considered as a 'green house gas' is:

  1. $CO _2$
  2. $CH _4$
  3. $O _2$
  4. $O _3$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The gases in the atmosphere that absorb radiation are known as "greenhouse gases" (sometimes abbreviated as GHG) because they are largely responsible for the greenhouse effect. The most significant greenhouse gases are water vapor $(H _2O)$, carbon dioxide $(CO _2)$, methane $(CH _4)$  and nitrous oxide $(N _2O)$ and ozone $(O _3)$. While oxygen $(O _2)$ is the second most abundant gas in our atmosphere, $O _2$ does not absorb thermal infrared radiation to cause green house effect.


Hence, the correct option is C.

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

The two gases making the highest relative contribution to the greenhouse gases are:

  1. $CO _{2}$ and $CH _{4}$
  2. $CH _{4}$ and $N _{2}O$
  3. $CFC{s}$ and $N _{2}O$
  4. $CO _{2}$ and $N _{2}O$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Highest contribution to green house gases are $CO _2 $  $60$% and $CH _4$  $20$% which absorbs more of the infrared rays and UV rays and causes global warming.  

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

Identify the non-Green House Gas (GHG) from the following

  1. Methane

  2. Nitrous oxide

  3. Sulphur hexafluoride

  4. Carbon monoxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. Carbon Monoxide and other reactive gases Carbon monoxide (CO) is not considered a direct greenhouse gas, because it does not absorb terrestrial thermal IR energy strongly enough. 

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

Greenhouse gas is produced if oxygen is combined with :

  1. $\displaystyle Na$
  2. $\displaystyle S$
  3. $\displaystyle { H } _{ 2 }$
  4. $\displaystyle Ne$
  5. $\displaystyle C$
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

$C + O _2 \rightarrow CO _2$
$CO _2$ is a green house gas, which act as blanket in earth atmosphere, and cause Green house effect.
Green House Effect:
The Earth gets energy from the sun in the form of sunlight. The Earth's surface absorbs some of this energy and heats up. That's why the surface of a road can feel hot even after the sun has gone down—because it has absorbed a lot of energy from the sun. The Earth cools down by giving off a different form of energy, called infrared radiation. But before all this radiation can escape to outer space, greenhouse gases in the atmosphere absorb some of it, which makes the atmosphere warmer. As the atmosphere gets warmer, it makes the Earth's surface warmer, too.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Natural gas is primarily ________.

  1. ethane

  2. acetylene

  3. ethene

  4. methane
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Natural gas is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium.

Multiple choice chemistry rocks and minerals coal petroleum non-renewable sources of energy

Which is the important constituent (95%) of natural gas?

  1. Methane

  2. Propane

  3. Ethane

  4. Chlorine
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Methane is the important constituent (95%) of natural gas. Methane has high heat of combustion. Hence, it is used as fuel.
$CH _4 + 2O _2 \rightarrow CO _2 + 2H _2O + heat$