Chemistry

Chemistry of Gases and Applications

1,190 Questions

The chemistry of gases covers atmospheric composition, noble gases, and various applications of gas compounds in industrial and biological processes. Understanding the properties of common gases, their reactions, and environmental occurrences is vital for general science sections. Use these questions to practice identifying gases and their specific uses.

Atmospheric gasesNoble gasesGas applicationsChemical compounds

Chemistry of Gases and Applications Questions

Multiple choice components and importance of food science of kitchen evs

Mark the correct option with respect to composition of biogas.

  1. $50-70\%$ $H _2$
  2. $30-40\%$ $CO _2$
  3. $95\%$ $CH _4$
  4. $10\%$ CO
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The composition of biogas is :

50-75% - Methane.
20-40%- Carbon dioxide.

So, the correct answer is "30-40% CO2".

Multiple choice components and importance of food science of kitchen evs

Biogas is a mixture of

  1. ${CO +H _2 +CO _2}$
  2. ${CH _4+CO+CO _2}$
  3. ${CH _4 +CO _2+H _2}$
  4. ${CO +CO _2 + NO _2}$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Biogas is principally a mixture of methane (CH4) and carbon dioxide (CO2) along with hydrogen (H2) gas in small amount. It can be collected from landfills, covered lagoons, or enclosed tanks called anaerobic digesters. Biogas is commonly made from animal manure, sludge settled from wastewater, and at landfills containing organic wastes. Hence option C is correct.

Multiple choice components and importance of food science of kitchen evs

Mixture of gases formed when the slurry of animal dung and water is allowed to ferment in the absence of oxygen. 

  1. Biomass

  2. Biogas

  3. Methanogens

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

Definition of biogas- The gas fermentation of animal during which takes place in the absence of air due to the presence of anaerobic bacteria. 

Multiple choice components and importance of food science of kitchen evs

Biogas is composed of

  1. methane, carbon dioxide, nitrogen and hydrogen

  2. carbon dioxide, nitrogen and hydrogen

  3. ethane, carbon dioxide, nitrogen and hydrogen

  4. methane, carbon dioxide, nitrogen and sulphur
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biogas is primarily a mixture of methane and carbon dioxide, with smaller amounts of hydrogen, nitrogen, and hydrogen sulfide. Option A is the most accurate description among the choices.

Multiple choice chemistry chemical reactions of organic compounds commercially important alcohols - methanol methanol some commercially important alcohols uses of alcohols

The compound (s) used as an antifreeze in radiators of automobiles is/are?

  1. methyl alcohol

  2. ethyl alcohol

  3. ethyl alcohol + water

  4. methyl alcohol + water
Reveal answer Fill a bubble to check yourself
C,D Correct answer
Explanation

Anitfreeze agents work to prevent the vehicle from overheating in summers and freezing in winters. The anifreeze agents used are ;ethyl alcohol + water and methyl alcohol + water.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

65% by volume is hydrogen gas in the biogas. 

  1. True

  2. False

  3. Ambiguous

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

Answer is B.

Biogas is characterized based on its chemical composition and the physical characteristics which result from it. It is primarily a mixture of methane (${ CH } _{ 4 }$) and inert carbonic gas (${ CO } _{ 2 }$). However the name 'biogas' gathers a large variety of gases resulting from specific treatment processes, starting from various organic waste - industries, animal or domestic origin waste, etc . 
Hence, the statement is false.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

The gas obtained by the fermentation of biomass is :

  1. LPG

  2. CNG

  3. hydrogen

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

Fuel-grade ethanol is one energy source that has great potential for being generated from biomass. The gas obtained by the fermentation of biomass is called biogas.

Multiple choice

Which of the following gases is green in color?

  1. Chlorine

  2. Hydrogen

  3. Krypton

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

Chlorine gas is well known for its distinct pale yellow-green color at room temperature. Hydrogen, Krypton, and Neon are colorless gases.