Chemistry

Chemistry of Gases and Applications

1,175 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 chemistry air around us importance of oxygen is air present everywhere around us? air as a natural resource

Choose the correct answer form the alternatives given.
Scuba divers are at high risk due to high concentration of dissolved gases while breathing air at high pressure under water. The tanks used by Scuba divers are filled with :-

  1. Air diluted with helium

  2. 02

  3. N

  4. A mixture of nitrogen and helium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Scuba divers use a mixture of gases to avoid nitrogen narcosis and oxygen toxicity at high pressures. Helium is often used to dilute the mixture because it is inert and less soluble in blood than nitrogen.

Multiple choice chemistry air around us importance of oxygen is air present everywhere around us? air as a natural resource

The nitrogen molecules present in the air can be converted into nitrates and nitrites by :

  1. nitrogen fixation

  2. carbon fixation

  3. industries in the form of by ctprodu

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

The nitrogen molecules present in the air can be converted into nitrates and nitrites by nitrogen fixation.


Hence the option A is correct.

Multiple choice chemistry chemical reactions of organic compounds combustion and thermal cracking of hydrocarbons chemical properties of carbon compounds chemical properties of organic compounds

Statement 1 : When a hydrocarbon is combusted in air, carbon monoxide is the major product.
Statement 2 : Air contains much more nitrogen than oxygen.

  1. <p>Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.</p>

  2. <p>Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.</p>

  3. <p>Statement 1 is correct but Statement 2 is not correct.</p>

  4. <p>Statement 1 is not correct but Statement 2 is correct.</p>

  5. <p>Both the Statement 1 and Statement 2 are not correct. </p>
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement 1 : When a hydrocaron is combusted in air, $CO _2$ is the major product whereas the $CO$ is produced if there is incomplete combustion of some hydrocarbon.
Statement 2: Air contains much more nitrogen than air.
$N _2= 78$%
$O _2 = 21$%

Multiple choice chemistry hydrocarbons introduction to alkenes - ethyne acetylene alkynes

The compound used in Hawker's lamp and in light houses for illumination purposes is :

  1. methane

  2. ethane

  3. ethylene

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

Acetylene is used in-
Illumination of cycle lamps, hawker's lamps and buoys in light houses.
Producing oxyacetylene flame for welding and cutting.

Multiple choice

What is laughing gas?

  1. Nitrous Oxide

  2. Carbon monoxide

  3. Sulphur dioxide

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

Nitrous oxide is commonly known as laughing gas. It is used in medicine and dentistry for its anesthetic and analgesic effects.

Multiple choice

CNG stands for?

  1. Carbon Nitrogen Gas

  2. Compressed Natural Gas

  3. Combustible Natural Gas

  4. Carbon Noxious Gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

CNG stands for Compressed Natural Gas. It is a fuel made by compressing natural gas (mostly methane) to less than 1 percent of the volume it occupies at standard atmospheric pressure.

Multiple choice physics simple electric circuits bulbs bulb bulb connected to an electric cell

An electric bulb is filled with :

  1. hydrogen

  2. oxygen and hydrogen

  3. electrical energy

  4. nitrogen and argon
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Incandescent light bulbs are filled with an inert gas like nitrogen, argon, or krypton - so that the filament doesn't catch fire. Early ones were a vacuum. Flourecent lamps are filled with an inert gas plus mercury vapour or neon, which glows ultra-violet when charged. The inside of the bulb is painted to give it colour.

Multiple choice chemistry the periodic table newland's law of octaves development of the modern periodic table into the history

The discovery of which of the following group of elements gave a death blow to the Newland's Law?

  1. Inert gases

  2. Alkali metals

  3. Transuranic element

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

The discovery of zero group of elements (inert gases) gave a death blow to the Newland's Law.
According to Newlands Law of octaves, when the elements are arranged in the increasing order of atomic weights, the properties of every eighth element are similar to the first one.


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

Multiple choice chemistry the s-block elements (alkali and alkaline earth metals) biological importance of magnesium and calcium biological importance of elements biological importance of s block elements biological importance of sodium and potassium

Which is used for fixing atmospheric nitrogen?

  1. $CaCN _2$ (nitrolim)
  2. $Li _3N$
  3. $Mg _3N _2$

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For fixing atmospheric nitrogen -nitrolim is used and further $CaCN _2+C$ is used as fertilizer.

Multiple choice zoology environmental pollution primary air pollutants air pollution - types and sources not for breathing not for drinking

The chemical name of freon is 

  1. Dichloroflouro methane

  2. Trichlorotriflouro ethane

  3. Dichlorofluorine

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

Dichlorodifluoromethane (R-12) is a colorless gas usually sold under the brand name Freon-12. Thus, the chemical name of freon is chlorodifluoromethane. It is used as a refrigerant and aerosol spray propellant.