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All questions of Electrolysis for UPSC CSE Exam
What is an electrolyte?- a)A substance that conducts electricity in solution or when molten
- b)A substance that does not conduct electricity
- c)A substance that is resistant to electricity
- d)A substance that can only conduct electricity in a solid state
Correct answer is option 'A'. Can you explain this answer?
What is an electrolyte?
a)
A substance that conducts electricity in solution or when molten
b)
A substance that does not conduct electricity
c)
A substance that is resistant to electricity
d)
A substance that can only conduct electricity in a solid state
|
Paradigm Institute answered |
An electrolyte is a substance that conducts electricity when dissolved in a solution or when molten. It contains ions that enable the flow of electric charge.
Which of the following statements is true about electrolysis?- a)It only occurs in solids
- b)It can only be used to separate compounds
- c)It can be used for both purification and deposition of metals
- d)It requires the presence of light to proceed
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements is true about electrolysis?
a)
It only occurs in solids
b)
It can only be used to separate compounds
c)
It can be used for both purification and deposition of metals
d)
It requires the presence of light to proceed
|
|
Paradigm Institute answered |
Electrolysis can be used for both the purification and deposition of metals. It enables the separation of impurities from metals and the electroplating of metals onto surfaces.
Which of the following is not a product of the electrolysis of water?- a)Oxygen gas
- b)Hydrogen gas
- c)Sodium hydroxide
- d)Oxygen gas and hydrogen gas are both products
Correct answer is option 'C'. Can you explain this answer?
Which of the following is not a product of the electrolysis of water?
a)
Oxygen gas
b)
Hydrogen gas
c)
Sodium hydroxide
d)
Oxygen gas and hydrogen gas are both products
|
|
Paradigm Institute answered |
Sodium hydroxide is not a product of the electrolysis of water. The products of electrolyzing water are hydrogen gas and oxygen gas.
What is the primary purpose of electroplating?- a)To enhance the appearance of an object
- b)To increase the weight of an object
- c)To reduce the melting point of an object
- d)To decrease the conductivity of an object
Correct answer is option 'A'. Can you explain this answer?
What is the primary purpose of electroplating?
a)
To enhance the appearance of an object
b)
To increase the weight of an object
c)
To reduce the melting point of an object
d)
To decrease the conductivity of an object
|
|
Paradigm Institute answered |
The primary purpose of electroplating is to enhance the appearance of an object by coating it with a layer of a different metal. It can also provide protection against corrosion.
Which of the following metals can be extracted from their ores using electrolysis?- a)Copper
- b)Silver
- c)Iron
- d)Aluminum
Correct answer is option 'D'. Can you explain this answer?
Which of the following metals can be extracted from their ores using electrolysis?
a)
Copper
b)
Silver
c)
Iron
d)
Aluminum
|
|
Paradigm Institute answered |
Aluminum can be extracted from its ore (bauxite) using electrolysis. Copper, silver, and iron are typically extracted using other methods.
Which of the following best describes electrolysis?- a)The process of breaking down compounds using electricity
- b)The process of breaking down compounds using heat
- c)The process of combining elements using electricity
- d)The process of combining elements using heat
Correct answer is option 'A'. Can you explain this answer?
Which of the following best describes electrolysis?
a)
The process of breaking down compounds using electricity
b)
The process of breaking down compounds using heat
c)
The process of combining elements using electricity
d)
The process of combining elements using heat
|
Catalyst Learningacademy answered |
The process of breaking down compounds using electricity is known as electrolysis. It involves the passage of an electric current through an electrolyte to induce a chemical reaction.
What happens at the anode during electrolysis?- a)Oxidation occurs
- b)Reduction occurs
- c)The electrolyte breaks down
- d)No reaction occurs
Correct answer is option 'A'. Can you explain this answer?
What happens at the anode during electrolysis?
a)
Oxidation occurs
b)
Reduction occurs
c)
The electrolyte breaks down
d)
No reaction occurs
|
|
Catalyst Learningacademy answered |
At the anode during electrolysis, oxidation occurs. Oxidation involves the loss of electrons, leading to the formation of new substances.
Which of the following is not an application of electrolysis?- a)Production of aluminum
- b)Electroplating of jewelry
- c)Electrolysis of water to produce hydrogen fuel
- d)Production of plastics
Correct answer is option 'D'. Can you explain this answer?
Which of the following is not an application of electrolysis?
a)
Production of aluminum
b)
Electroplating of jewelry
c)
Electrolysis of water to produce hydrogen fuel
d)
Production of plastics
|
|
Catalyst Learningacademy answered |
The production of plastics is not an application of electrolysis. However, electrolysis is involved in the production of aluminum, electroplating of jewelry, and electrolysis of water for hydrogen fuel production.
Which of the following substances is commonly used as an electrolyte in lead-acid batteries?- a)Sulphuric acid
- b)Nitric acid
- c)Hydrochloric acid
- d)Acetic acid
Correct answer is option 'A'. Can you explain this answer?
Which of the following substances is commonly used as an electrolyte in lead-acid batteries?
a)
Sulphuric acid
b)
Nitric acid
c)
Hydrochloric acid
d)
Acetic acid
|
|
Catalyst Learningacademy answered |
Sulphuric acid is commonly used as an electrolyte in lead-acid batteries. It facilitates the chemical reactions necessary for energy storage and release.
Which of the following is an example of an electrolyte?- a)Pure water
- b)Vinegar (acetic acid)
- c)Cooking oil
- d)Mercury
Correct answer is option 'B'. Can you explain this answer?
Which of the following is an example of an electrolyte?
a)
Pure water
b)
Vinegar (acetic acid)
c)
Cooking oil
d)
Mercury
|
|
Catalyst Learningacademy answered |
Vinegar (acetic acid) is an example of an electrolyte as it can conduct electricity when dissolved in water. Pure water, cooking oil, and mercury are not electrolytes.
What is the purpose of an inert electrode in electrolysis?- a)To prevent the electrolyte from reacting with the electrode
- b)To enhance the speed of the electrolysis process
- c)To increase the voltage applied during electrolysis
- d)To increase the temperature of the electrolyte
Correct answer is option 'A'. Can you explain this answer?
What is the purpose of an inert electrode in electrolysis?
a)
To prevent the electrolyte from reacting with the electrode
b)
To enhance the speed of the electrolysis process
c)
To increase the voltage applied during electrolysis
d)
To increase the temperature of the electrolyte
|
|
Paradigm Institute answered |
An inert electrode is used in electrolysis to prevent the electrolyte from reacting with the electrode. It allows the desired chemical reaction to occur without interfering with the electrode material.
Which of the following gases is produced at the anode during the electrolysis of brine?- a)Oxygen gas
- b)Hydrogen gas
- c)Chlorine gas
- d)Carbon dioxide gas
Correct answer is option 'C'. Can you explain this answer?
Which of the following gases is produced at the anode during the electrolysis of brine?
a)
Oxygen gas
b)
Hydrogen gas
c)
Chlorine gas
d)
Carbon dioxide gas
|
|
Catalyst Learningacademy answered |
Chlorine gas is produced at the anode during the electrolysis of brine (sodium chloride solution). Oxygen gas is produced at the anode during the electrolysis of water.
What is the unit of electric charge used in electrolysis?- a)Ampere
- b)Ohm
- c)Coulomb
- d)Volt
Correct answer is option 'C'. Can you explain this answer?
What is the unit of electric charge used in electrolysis?
a)
Ampere
b)
Ohm
c)
Coulomb
d)
Volt
|
|
Catalyst Learningacademy answered |
The unit of electric charge used in electrolysis is the coulomb (C). It represents a quantity of charge equal to the flow of one ampere of current for one second.
What is the process of electrorefining?- a)Purifying a metal using electrolysis
- b)Refining a metal using heat
- c)Combining two metals using electrolysis
- d)Breaking down a metal using heat
Correct answer is option 'A'. Can you explain this answer?
What is the process of electrorefining?
a)
Purifying a metal using electrolysis
b)
Refining a metal using heat
c)
Combining two metals using electrolysis
d)
Breaking down a metal using heat
|
|
Paradigm Institute answered |
Electrorefining is the process of purifying a metal using electrolysis. It allows impurities to be selectively removed from a metal to obtain a higher purity product.
Which of the following factors affects the rate of electrolysis?- a)Temperature
- b)Concentration of the electrolyte
- c)Voltage applied
- d)All of the above
Correct answer is option 'D'. Can you explain this answer?
Which of the following factors affects the rate of electrolysis?
a)
Temperature
b)
Concentration of the electrolyte
c)
Voltage applied
d)
All of the above
|
|
Paradigm Institute answered |
The rate of electrolysis can be affected by factors such as temperature, concentration of the electrolyte, and the voltage applied. These factors influence the speed and efficiency of the electrolytic process.
Which of the following statements is true about electrolysis?- a)It is a spontaneous process
- b)It can only occur at high temperatures
- c)It requires an external source of energy
- d)It can only occur in the presence of a catalyst
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements is true about electrolysis?
a)
It is a spontaneous process
b)
It can only occur at high temperatures
c)
It requires an external source of energy
d)
It can only occur in the presence of a catalyst
|
|
Paradigm Institute answered |
Electrolysis requires an external source of energy, typically in the form of an electric current. It is a non-spontaneous process that drives chemical reactions through the application of electrical energy.
Which of the following is not a product of the electrolysis of molten aluminum oxide?- a)Aluminum metal
- b)Oxygen gas
- c)Carbon dioxide gas
- d)Carbon monoxide gas
Correct answer is option 'C'. Can you explain this answer?
Which of the following is not a product of the electrolysis of molten aluminum oxide?
a)
Aluminum metal
b)
Oxygen gas
c)
Carbon dioxide gas
d)
Carbon monoxide gas
|
|
Paradigm Institute answered |
Carbon dioxide gas is not a product of the electrolysis of molten aluminum oxide. The products are aluminum metal and oxygen gas.
What happens at the cathode during electrolysis?- a)Reduction occurs
- b)Oxidation occurs
- c)The electrolyte breaks down
- d)No reaction occurs
Correct answer is option 'A'. Can you explain this answer?
What happens at the cathode during electrolysis?
a)
Reduction occurs
b)
Oxidation occurs
c)
The electrolyte breaks down
d)
No reaction occurs
|
|
Catalyst Learningacademy answered |
At the cathode during electrolysis, reduction occurs. Reduction involves the gain of electrons, leading to the formation of new substances.
What is the process of electroplating?- a)Coating a metal object with a layer of gold using electrolysis
- b)Coating a metal object with a layer of plastic using electrolysis
- c)Coating a metal object with a layer of paint using electrolysis
- d)Coating a metal object with a layer of oil using electrolysis
Correct answer is option 'A'. Can you explain this answer?
What is the process of electroplating?
a)
Coating a metal object with a layer of gold using electrolysis
b)
Coating a metal object with a layer of plastic using electrolysis
c)
Coating a metal object with a layer of paint using electrolysis
d)
Coating a metal object with a layer of oil using electrolysis
|
|
Catalyst Learningacademy answered |
Electroplating is the process of coating a metal object with a layer of gold (or other metals) using electrolysis. It is commonly used to enhance the appearance and protect against corrosion.
What is the chemical formula for sodium chloride?- a)NaCl2
- b)NaCl
- c)Na2Cl
- d)Na2Cl2
Correct answer is option 'B'. Can you explain this answer?
What is the chemical formula for sodium chloride?
a)
NaCl2
b)
NaCl
c)
Na2Cl
d)
Na2Cl2
|
|
Catalyst Learningacademy answered |
The chemical formula for sodium chloride is NaCl. It is composed of one sodium ion (Na+) and one chloride ion (Cl-).
Chapter doubts & questions for Electrolysis - Lucent for GK 2025 is part of UPSC CSE exam preparation. The chapters have been prepared according to the UPSC CSE exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for UPSC CSE 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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