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
A
Correct answer
Explanation
Boiling point: -88.5oC
Melting point: -90.8oC
Relative density (water = 1): 1.23 at -89oC
Solubility in water (g/100 ml at 15oC: 0.15)
Vapour pressure (k Pa at 20oC): 5150
Relative vapour density (air = 1): 1.53
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C
-
P
-
S
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A<font size="2">s</font>
C
Correct answer
Explanation
Natural gas is called 'sour gas' when it contains significant amounts of hydrogen sulfide (H₂S). The sulfur content gives it corrosive properties and a rotten egg odor. Carbon (C), phosphorus (P), and arsenic (As) are not responsible for the sour designation.
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Only 1
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Only 2
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Both 1 and 2
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Neither 1 nor 2
B
Correct answer
Explanation
Statement 1 is incorrect: Methane is known as marsh gas because it is formed by methanogenic organisms that can be found in marshy areas.
Statement 2 is correct: Hydrogen sulphide and sulphur bacteria mostly smell like rotten eggs.
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Carbon dioxide
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Nitrogen
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Carbon monoxide
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Oxygen
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Methane
C
Correct answer
Explanation
Carbon monoxide is the most dangerous when inhaled as it can lead to significant toxicity to the central nervous system and heart and can even cause death.
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75% oxygen, combustion
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75% chlorine, lighting
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75% sulphur, combustion
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75% methane, lighting
D
Correct answer
Explanation
Biogas fuel contains 75% methane gas and is used for lighting.
B
Correct answer
Explanation
Fe is used as a catalyst in the manufacture of ammonia by Haber's process.
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An anaesthesia
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In medicine
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In cold storages
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For preparation of artificial silk
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As a cleansing agent
A
Correct answer
Explanation
Ammonia is not used as an anaesthesia .
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Urea
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Bleaching powder
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Aqua-regia
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Nitrolim
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Chlorofluorocarbon
E
Correct answer
Explanation
Chlorofluorocarbon is also known as Freon.
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Calcium oxide
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Carborundum
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Calcium carbide
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Heated aluminium
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Calcium
C
Correct answer
Explanation
Calcium carbide reacts with nitrogen to form Nitrolim(CaCN2), which is used as fertiliser.
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Conc. H2SO4
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CaO
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P2O5
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HCl
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Anhydrous CaCl2
B
Correct answer
Explanation
CaO (quick lime) does not react with ammonia but reacts readily with moisture. CaO + H2O ------>Ca(OH)2.
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Lead nitrate
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Silver nitrate
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Ammonium nitrate
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Calcium nitrate
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Copper nitrate
C
Correct answer
Explanation
Ammonium nitrate decomposes into nitrous oxide and water.
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HNO3
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NH4Cl
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NH4NO3
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NH4Cl + NaOH
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NH4Cl + NaNO2
D
Correct answer
Explanation
NH4Cl + NaOH gives ammonia on heating.
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(NH4)2CO3
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NH2CONH2
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NH2COONH4
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(NH4)2SO4
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CNNH2
B
Correct answer
Explanation
When ammonia is heated with CO2 under pressure, urea NH2CONH2 is formed.
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Coke
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H2SO4
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HCl
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Liquid NH3
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HNO3
D
Correct answer
Explanation
Liquid NH3 is used for cooling in refrigeration.
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Only a
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Only a and b
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Only b
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Only b and c
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Only c
C
Correct answer
Explanation
This is the correct option as this statement is false. Plasma is a mixture of free electrons and ions.