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 physics heat and energy causes of greenhouse effect global warming adaptation in animals

Which of the following may be the cause of greenhouse effect?

  1. Burning of fossil fuel like coal in the industries for producing electricity.

  2. Burning of fossil fuel leads to high emissions of carbon di-oxide gas.

  3. Nitrous oxide, also a green house gas is produced during nylon and nitric acid production.

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

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect on planets. The primary greenhouse gases in Earth's atmosphere are water vapour $(H _2O)$, carbon dioxide $(CO _2)$, methane $CH _4)$, nitrous oxide $(N _2O)$ and ozone $(O _3)$. 

Carbon dioxide enters the atmosphere through burning fossil fuels (coal, natural gas, and oil), solid waste, trees and other biological materials, and also as a result of certain chemical reactions. Nitrous oxide is emitted during nylon and nytric acid production, agricultural and industrial activities, combustion of fossil fuels and solid waste, as well as during treatment of wastewater.

Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Biogas contains

  1. $CH _4+CO+CO _2$
  2. $CH _4+CO _2+H _2$
  3. $CO+CO _2+H _2$
  4. $CO+CO _2+NO _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Biogas is a form of energy produced from anaerobic decomposition of waste material and organic matter. It is a renewable source of energy and a good alternative in place of fossil fuels which are depleting with time. Biogas is produced by methanogenic bacteria which breakdown organic matter in the absence of oxygen. They produce biogas which is a mixture of gases like methane (CH4), carbon dioxide (CO2) and hydrogen (H2) in different composition.
So, the correct answer is 'CH4 + CO2 + H2 '.
Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Biogas contains

  1. $50-70\%$ methane
  2. $30-40\%$ methane

  3. Traces of methane
  4. $80-95\%$ ethane
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Biogas is a form of energy produced from anaerobic decomposition of waste material and organic matter. Biogas is a mixture of gases like methane (CH4), carbon dioxide (CO2) and hydrogen (H2) in different composition as follows:
  • Methane 50- 75%
  • Carbon dioxide 25- 35%
  • Hydrogen 0 -1%
Apart from these gases, other gases like hydrogen sulphide and nitrogen are present in a small amount.
So, the correct answer is '50 - 70%'.
Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Biogas mainly consists of

  1. Ethane
  2. $CO _2$
  3. $H _2$

  4. Methane
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Biogas is a form of energy produced from anaerobic decomposition of waste material and organic matter. It is a renewable source of energy and a good alternative in place of fossil fuels which are depleting with time. Biogas is produced by methanogenic bacteria which breakdown organic matter in the absence of oxygen. They produce biogas which is a mixture of gases like methane (CH4), carbon dioxide (CO2) and hydrogen (H2) in different composition as follows:
  • Methane 50- 75%
  • Carbon dioxide 25- 35%
  • Hydrogen 0 -1%
Hence, most of the fraction is of methane.
So, the correct answer is 'Methane'.
Multiple choice commercial applications management of natural resources unequal distribution of resources protecting our environment rules are for everyone

Biogas consists of

  1. Carbon monoxide, methane and hydrogen.

  2. Carbon dioxide, methane and hydrogen.

  3. Carbon monoxide, ethane and hydrogen.

  4. Carbon dioxide, ethane and hydrogen.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas consists mostly of methane (CH$ _4$), carbon dioxide (CO$ _2$) and a mix of trace gases including nitrogen, hydrogen sulfide (H$ _2$S), hydrogen and others. Methane is the main constituent (63%) of the biogas. The other major constituent is CO$ _2$ (30%).

Thus, the correct answer is option B.

Multiple choice chemistry occurrence of carbon compounds in nature substances, objects and energy alternative fuels and energy sources alternative sources of energy

The main component of Bio gas is ___________.

  1. Methane

  2. Benzene

  3. Ethylene

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

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

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Among the following, which is not the component of coal gas?

  1. Methane

  2. Hydrogen

  3. Oxygen

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

Coal gas contains calorific gases like hydrogen, methane, carbon monoxide and many hydrocarbons and non-calorific gases like nitrogen and carbon dioxide.


The composition of coal gas varied according to the type of coal and the temperature of carbonisation. Typical figures were:

hydrogen 50%
methane 35%
carbon monoxide 10%
ethylene 5%


Hence, the correct option is $\text{C}$

Multiple choice chemistry rocks and minerals coal and its products study of coal coal

Which of the following contains methane, hydrogen and carbon dioxide?

  1. Producer gas

  2. Water gas

  3. Coal gas

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

Generally coal mine and coal gas contain Carbon monoxide, carbon dioxide, methane, oxygen, nitrogen, hydrogen, and other hydrocarbons.

Multiple choice biology wastewater story personal and public cleanliness who will do this? basics of water pollution

Biogas is produced due to the .................. fermentation of the slurry of animals dung.

  1. Pesticides

  2. Anaerobic

  3. Coal

  4. Methane
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas is produced due to the anaerobic fermentation of the slurry of animals dung.
Microbial conversion of organic matter to methane has become attractive as a method of waste treatment and resource recovery. This process is anaerobic and is carried out by action of various groups of anaerobic bacteria.
Three basic points about this process are that most of the important bacteria involved in biogas production process are anaerobes and slow growing, a greater degree of metabolic specialization is observed in these anaerobic microorganisms and that most of the free energy present in the substrate is found in the terminal product methane. Since less energy is available for the growth of organism, less microbial biomass is produced and, consequently, disposal of sludge after the digestion may not be a major problem.

Multiple choice botany the living world archaebacteria the three domains of life classification of microbes

For production of methane, methanogens

  1. Oxidise carbon dioxide

  2. Reduce carbon dioxide

  3. Reduce alcohol

  4. Oxidise alcohol
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Methanogens are microorganisms that produce methane in absence of oxygen by the process called as methanogenesis. They belong to the kingdom Monera and the domain archaea. They use inorganic material as the source of energy such as hydrogen sulfide, elemental sulfur, ferrous iron, ammonia. They reduce carbon dioxide to methane and use hydrogen gas as an electron-donating reductant.

Thus, the correct answer is 'Reduce carbon dioxide.'