Hydrogen and its Compounds - Applications
Q. In which application is hydrogen used as a reducing agent?
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A.
Electrolysis
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B.
Metal extraction
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C.
Acid-base neutralization
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D.
Combustion
Solution
Hydrogen acts as a reducing agent in the extraction of metals from their ores, such as in the reduction of metal oxides.
Correct Answer: B — Metal extraction
Q. What is the main environmental benefit of using hydrogen as a fuel?
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A.
It produces carbon dioxide
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B.
It is renewable
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C.
It produces only water as a byproduct
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D.
It is cheaper than fossil fuels
Solution
The main environmental benefit of using hydrogen as a fuel is that it produces only water as a byproduct when combusted.
Correct Answer: C — It produces only water as a byproduct
Q. What is the primary use of hydrogen in the production of hydrochloric acid?
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A.
As a reactant
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B.
As a catalyst
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C.
As a solvent
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D.
As a byproduct
Solution
Hydrogen is used as a reactant in the synthesis of hydrochloric acid when it reacts with chlorine.
Correct Answer: A — As a reactant
Q. What is the role of hydrogen in fuel cells?
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A.
To act as a catalyst
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B.
To provide energy through combustion
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C.
To produce electricity through a chemical reaction
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D.
To store energy
Solution
In fuel cells, hydrogen reacts with oxygen to produce electricity, water, and heat, making it a clean energy source.
Correct Answer: C — To produce electricity through a chemical reaction
Q. What is the significance of hydrogen in the synthesis of methanol?
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A.
It acts as a solvent
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B.
It is a reactant
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C.
It is a catalyst
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D.
It is a byproduct
Solution
Hydrogen is a reactant in the synthesis of methanol, where it reacts with carbon monoxide.
Correct Answer: B — It is a reactant
Q. Which compound is formed when hydrogen reacts with chlorine?
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A.
Hydrochloric acid
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B.
Hydrogen chloride
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C.
Chlorine gas
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D.
Chlorinated hydrocarbons
Solution
When hydrogen reacts with chlorine, hydrogen chloride (HCl) is formed, which is a gas at room temperature.
Correct Answer: B — Hydrogen chloride
Q. Which of the following hydrogen compounds is used in the production of fertilizers?
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A.
Hydrogen sulfide
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B.
Ammonia
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C.
Hydrochloric acid
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D.
Water
Solution
Ammonia, produced from hydrogen and nitrogen, is a key ingredient in the manufacture of fertilizers.
Correct Answer: B — Ammonia
Q. Which of the following is a common application of hydrogen in the petroleum industry?
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A.
Hydrogenation of fats
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B.
Electrolysis of water
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C.
Production of sulfuric acid
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D.
Synthesis of ammonia
Solution
Hydrogen is used in the hydrogenation process to convert unsaturated fats into saturated fats in the petroleum industry.
Correct Answer: A — Hydrogenation of fats
Q. Which of the following is NOT a use of hydrogen in industry?
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A.
Rocket fuel
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B.
Hydrogenation of oils
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C.
Production of ammonia
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D.
Synthesis of nitric acid
Solution
Hydrogen is not used in the direct synthesis of nitric acid; instead, it is primarily used in the production of ammonia and hydrogenation processes.
Correct Answer: D — Synthesis of nitric acid
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