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 chemistry study of the first element - hydrogen occurrence of hydrogen introduction to hydrogen hydrogen

Following reaction is called __________ reaction.
$CO (g)\ +\ H _2O (g) \xrightarrow [catalyst]{673} CO _2(g)\ +\ H _2(g)$

  1. combustion

  2. disproportionate

  3. coal gasification

  4. water-gas shift
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The water-gas shift reaction (WGSR) describes the reaction of carbon monoxide and water vapor to form carbon dioxide and hydrogen (the mixture of carbon monoxide and hydrogen is known as water gas):

$CO+{ H } _{ 2 }O\rightleftharpoons C{ O } _{ 2 }+{ H } _{ 2 }$

Multiple choice chemistry study of the first element - hydrogen occurrence of hydrogen introduction to hydrogen hydrogen

Which of the following reactions is an example of a use of water gas in the synthesis of other compounds?

  1. $CH _4(g) +\ H _2O(g) \xrightarrow[Ni]{1270 K} CO(g) +\ 3H _2(g)$
  2. $CO(g) +\ H _2O(g) \xrightarrow[Catalyst]{673 K} CO _2(g) +\ H _2(g)$
  3. $CnH _{2n+2}(g) +\ nH _2O(g) \xrightarrow[Ni]{1270 K} nCO(g) +\ (2n+1)H _2(g)$
  4. $CO(g) +\ 2H _2(g) \xrightarrow[Catalyst]{Cobalt} CH _3OH(l)$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Carbon monoxide and hydrogen react over a catalyst to produce methanol. Today, the most widely used catalyst is a mixture of copper and zinc oxides, supported on alumina, as first used by ICI in 1966. At 5–10 MPa (50–100 atm) and 250 °C (482 °F), the reaction is characterized by high selectivity (>99.8%): 

$\\ CO+2{ H } _{ 2 }→C{ H } _{ 3 }OH$

Multiple choice chemistry study of the first element - hydrogen occurrence of hydrogen introduction to hydrogen hydrogen

Water gas is also called as syngas

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Water gas is actually an older terminology. From the view point of composition, they both have the same components: Hydrogen and carbon monoxide, with or without some amount of carbon dioxide. However, what is different is the way they are produced. Water gas was usually produced by passing steam over red hot coke. On the other hand syngas is mainly produced industrially by steam reforming of natural gas that involves catalytic decomposition of methane in steam to give the resultant mixture along with the traditional coal gasification and various other methods.

Multiple choice modelling gases - the kinetic model ideal gases kinetic theory of gases physics

The gas, which is present the most in air, is___

  1. oxygen

  2. nitrogen

  3. carbon dioxide

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

1) Nitrogen $-78$%

2) Oxygen $-21$%
3) Inert Nobel gases $-0.9$%
4) Several trace gases $-0.1$%
The above list the different number of gases in descending order. As per the list clearly Nitrogen is the gas present in most air.

Multiple choice evs how to save fuel lpg, cng treasures from the earth fuel and conservation

The full form of C.N.G is:

  1. Compound Natural Gas

  2. Complex Natural Gas

  3. Compound New Gas

  4. Compressed Natural Gas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CNG is made by compressing natural gas (which is mainly composed of methane, CH4), to less than 1 percent of the volume, it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 2025 MPa (2,9003,600 psi), usually in cylindrical or spherical shapes. Thus it is also called Compressed natural gas (CNG) (Methane stored at high pressure).

Multiple choice chemistry chemical reactions of organic compounds alkanoic acids nomenclature of carboxyl group nomenclature of carboxylic acids

Which of the following statements is/are correct?

  1. Methane was named as fire damp as it forms explosive mixture with air

  2. Primary suffixes are added to the root word to show saturation or unsaturation in a C atom

  3. The IUPAC name of valerie acid is pentanoic acid

  4. The common name of hexanoic acid is caproic acid
Reveal answer Fill a bubble to check yourself
A,B,C,D Correct answer
Explanation
Methane was named as fire damp as it forms explosive mixture with air. It is a flammable gas found in coal mines.
Primary suffix  indicates the degree of saturation or unsaturation in the basic skeleton and is added immediately after the root word.
The IUPAC name of Valeric acid is pentanoic acid  being a liquid of pungent odor obtained from valerian roots.
The common name of hexanoic acid is caproic acid with an odor like limburger cheese.
Multiple choice chemistry air and water pollution control taj mahal: a case study a road to history air and water pollution

The gas which causes yellowing of Tajmahal:

  1. $H _{2}S$
  2. $SO _{2}$
  3. $CO _{2}$
  4. $NO _{2}$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In general, marbles that make palaces, other monuments and forms of architecture, limestone and natural sources of ammonia are severely affected by the action of oxides of sulphur($SO _2$).
The passage of $SO _2$ gas has caused the yellowing of Taj Mahal over these years.

Multiple choice urea organic compounds with functional group containing nitrogen

Urea is manufactured from:

  1. ammonia

  2. nitric acid

  3. nitrogen
  4. both $A$ and $B$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

he basic process, developed in 1922, is also called the Bosch–Meiser urea process after its discoverers. Various commercial urea processes are characterized by the conditions under which urea forms and the way that unconverted reactants are further processed. The process consists of two main equilibrium reactions, with incomplete conversion of the reactants. The first is carbamate formation: the fast exothermic reaction of liquid ammonia with gaseous carbon dioxide at high temperature and pressure to form ammonium carbamate (${ H } _{ 2 }N-COO-N{ H } _{ 4 }$).

 $2N{ H } _{ 3 }+C{ O } _{ 2 }\rightleftharpoons { H } _{ 2 }N-COO-N{ H } _{ 4 }$

The second is urea conversion: the slower endothermic decomposition of ammonium carbamate into urea and water:

$\\ { H } _{ 2 }N-COO-N{ H } _{ 4 }⇌(N{ H } _{ 2 })2CO+{ H } _{ 2 }O$

Multiple choice urea organic compounds with functional group containing nitrogen

Raw materials for production of urea are:

  1. ammonia and carbon dioxide

  2. oxygen and carbon dioxide

  3. ammonia and oxygen

  4. ammonia and phosphate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For use in industry, urea is produced from synthetic ammonia and carbon dioxide. As large quantities of carbon dioxide are produced during the ammonia manufacturing process as a by-product from hydrocarbons (predominantly natural gas, less often petroleum derivatives), or occasionally from coal, urea production plants are almost always located adjacent to the site where the ammonia is manufactured.

Multiple choice urea organic compounds with functional group containing nitrogen

__________ is the undesirable by-product produced in the manufacture of urea.

  1. Biuret

  2. Ammonium carbonate

  3. Carbon dioxide

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

Biuret is a chemical compound with the chemical formula ${ C } _{ 2 }{ H } _{ 5 }{ N } _{ 3 }{ O } _{ 2 }$. It is also known as carbamylurea. It is the result of condensation of two molecules of urea and is an impurity in urea-based fertilizers.

The most common impurity of synthetic urea is biuret, which impairs plant growth. Biuret is undesirable in fertilizer urea because it is toxic to crop plants, although to what extent depends on the nature of the crop and the method of application of the urea.

Multiple choice importance of waste disposal need and method for reducing, reusing and recycling waste geography

Formation of _________ is a reusing of organic matter.

  1. ammonia gas

  2. gobar gas

  3. methyl alcohol

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas which is also called as Gobar gas is obtained from organic waste. Biogas is a gaseous fuel which is a mixture of different gases that are formed by break down of organic matter in the absence of oxygen. Raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste are used for the production of biogas.

Multiple choice chemistry pure substances and mixtures: separation of mixtures difference between mixtures and compounds pure substance and mixtures types of pure substances

Which of the following is a pure gas?

  1. Ntural gas

  2. Water gas

  3. Laughing gas

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

Pure gas is not a mixture.


Natural gas consists of a mixture of gases like methane, higher alkanes, carbon dioxide etc. So it is not a pure gas.

Similarly, water gas is a mixture of $CO, H _2S$
Coal gas is a mixture of $H _2,CH _4,CO$
But laughing gas is only $N _2O$, So it is pure gas.


Hence, the correct option is $C$

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.