Preparing for the Joint Entrance Exam (JEE) can be a daunting task. With so many subjects to cover and so many topics to study, it can be challenging to know where to start. One essential topic in the JEE Mains syllabus is the General Principles and Process of Isolation of Elements. In this article, we will provide 50+ MCQ questions on the General Principles and Process of Isolation of Elements, along with detailed solutions to help you prepare for the JEE Mains exam.
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These 50+ MCQ questions are selected by the experts of studyrate.in and these are more difficult questions, which will help you to better understand General Principles and Process of Isolation of Elements JEE Mains MCQ Questions with Answers.
General Principles and Process of Isolation of Elements JEE Mains MCQ
The most abundant element in the Earth’s crust is: a) Oxygen b) Silicon c) Aluminum d) Iron
Answer: a) Oxygen
Explanation: Oxygen is the most abundant element in the Earth’s crust, accounting for approximately 46% of its mass.
The process of converting an ore into its oxide by heating strongly in the presence of excess air is called: a) Roasting b) Calcination c) Smelting d) Froth flotation
Answer: a) Roasting
Explanation: Roasting is the process of converting an ore into its oxide by heating it strongly in the presence of excess air. It is used to remove volatile impurities and to facilitate the subsequent reduction of the oxide.
The principle ore of aluminum is: a) Bauxite b) Haematite c) Magnetite d) Galena
Answer: a) Bauxite
Explanation: Bauxite is the principle ore of aluminum. It is a mixture of hydrated aluminum oxide minerals, iron oxides, and other impurities.
The process of electrolytic refining is used to obtain: a) High-purity metals b) Alloys c) Ores d) Metal oxides
Answer: a) High-purity metals
Explanation: Electrolytic refining is a process used to obtain high-purity metals. It involves the electrolysis of impure metal as the anode and a pure metal as the cathode in an electrolytic cell.
The process of extracting metals from their ores in the presence of suitable reducing agents is called: a) Roasting b) Calcination c) Smelting d) Froth flotation
Answer: c) Smelting
Explanation: Smelting is the process of extracting metals from their ores by heating them in the presence of suitable reducing agents. It involves the reduction of metal oxides to obtain the corresponding metals.
The process of concentration of ores using the difference in the densities of ore and impurities is called: a) Roasting b) Calcination c) Smelting d) Gravity separation
Answer: d) Gravity separation
Explanation: Gravity separation is the process of concentration of ores using the difference in the densities of the ore particles and impurities. It is based on the principle that heavier particles settle faster under the influence of gravity.
The metal that cannot be obtained by the reduction of its oxide with carbon is: a) Iron b) Zinc c) Copper d) Aluminum
Answer: d) Aluminum
Explanation: Aluminum cannot be obtained by the reduction of its oxide with carbon because aluminum is a stronger reducing agent than carbon. The Hall-Héroult process is used for the electrolytic reduction of aluminum oxide to obtain aluminum metal.
The extraction of silver from argentite ore is achieved by: a) Roasting b) Calcination c) Froth flotation d) Cyanidation
Answer: d) Cyanidation
Explanation: The extraction of silver from argentite ore is achieved by the cyanidation process. The ore is first converted into silver cyanide, which is soluble in water. The silver cyanide is then treated with a reducing agent to obtain metallic silver.
The process of converting impure metals into pure metals by electrolysis is called: a) Electrorefining b) Roasting c) Smelting d) Leaching
Answer: a) Electrorefining
Explanation: Electrorefining is the process of converting impure metals into pure metals by electrolysis. It involves the use of an electrolytic cell where the impure metal acts as the anode and a pure metal acts as the cathode.
The extraction of copper from low-grade ores such as copper pyrite is achieved by: a) Roasting b) Calcination c) Smelting d) Froth flotation
Answer: d) Froth flotation
Explanation: The extraction of copper from low-grade ores such as copper pyrite is achieved by the froth flotation process. In this process, the ore is finely ground, and a froth flotation solution is used to selectively separate copper sulfide minerals from the gangue materials.
The ore used for the extraction of iron is: a) Bauxite b) Haematite c) Galena d) Magnetite
Answer: b) Haematite
Explanation: Haematite is the ore used for the extraction of iron. It is an iron oxide mineral and the most important source of iron.
The process of converting an ore into its oxide by heating strongly without the presence of air is called: a) Roasting b) Calcination c) Smelting d) Froth flotation
Answer: b) Calcination
Explanation: Calcination is the process of converting an ore into its oxide by heating it strongly without the presence of air. It is used to remove volatile impurities and moisture from the ore.
The metal that is extracted by the Mond process is: a) Silver b) Platinum c) Gold d) Nickel
Answer: d) Nickel
Explanation: The Mond process is used for the extraction of nickel. It involves the conversion of nickel oxide to pure nickel metal through the reaction with carbon monoxide gas.
The process of converting a metal oxide into metal using carbon as the reducing agent is called: a) Roasting b) Calcination c) Smelting d) Reduction
Answer: d) Reduction
Explanation: Reduction is the process of converting a metal oxide into metal by removing oxygen. Carbon is commonly used as a reducing agent in this process.
The metal that is extracted by the electrolysis of its molten ore is: a) Copper b) Aluminum c) Zinc d) Iron
Answer: b) Aluminum
Explanation: Aluminum is extracted by the electrolysis of its molten ore, which is aluminum oxide (alumina). The process is known as the Hall-Héroult process.
The process of extracting metals from their ores by heating them in the presence of a reducing agent is called: a) Roasting b) Calcination c) Smelting d) Leaching
Answer: c) Smelting
Explanation: Smelting is the process of extracting metals from their ores by heating them in the presence of a reducing agent. It involves the reduction of metal oxides to obtain the corresponding metals.
The cyanide process is used for the extraction of: a) Gold b) Silver c) Copper d) Zinc
Answer: a) Gold
Explanation: The cyanide process is used for the extraction of gold. It involves the treatment of gold ore with a dilute solution of sodium cyanide, which forms a soluble complex with gold.
The process of separating gangue from the ore by preferential wetting is called: a) Roasting b) Calcination c) Smelting d) Froth flotation
Answer: d) Froth flotation
Explanation: Froth flotation is the process of separating gangue from the ore by preferential wetting. In this process, the finely ground ore is mixed with water and a frothing agent, and air is blown through the mixture to generate a froth that selectively collects the ore particles.
The metal used for the extraction of silver from its ore in the Parkes process is: a) Zinc b) Copper c) Aluminum d) Iron
Answer: a) Zinc
Explanation: The Parkes process is used for the extraction of silver from its ore. In this process, zinc is added to the molten ore, and the silver forms a zinc-silver alloy, which is then separated from the other impurities.
The process of converting an ore into its oxide by heating in the absence of air is called: a) Roasting b) Calcination c) Smelting d) Reduction
Answer: b) Calcination
Explanation: Calcination is the process of converting an ore into its oxide by heating it in the absence of air. It is used to remove volatile impurities and moisture from the ore.
The metal used as the cathode during the electrolytic refining of copper is: a) Copper b) Silver c) Gold d) Platinum
Answer: a) Copper
Explanation: In the electrolytic refining of copper, the impure copper acts as the anode, and a pure copper sheet is used as the cathode. The copper ions from the anode are reduced at the cathode, leading to the deposition of pure copper.
The process of extracting metals from their ores using bacteria is called: a) Leaching b) Smelting c) Calcination d) Roasting
Answer: a) Leaching
Explanation: Leaching is the process of extracting metals from their ores using bacteria. This technique is known as bioleaching and is used for the extraction of metals such as copper and uranium.
The metal used as the reducing agent in the extraction of iron from its ore in the blast furnace is: a) Carbon b) Hydrogen c) Oxygen d) Nitrogen
Answer: a) Carbon
Explanation: Carbon is used as the reducing agent in the extraction of iron from its ore in the blast furnace. It reacts with the oxygen in the ore to form carbon dioxide and reduces the iron oxide to molten iron.
The process of converting a metal oxide into metal using heat alone is called: a) Roasting b) Calcination c) Smelting d) Reduction
Answer: b) Calcination
Explanation: Calcination is the process of converting a metal oxide into metal using heat alone. It is carried out in the absence of air and is used to remove volatile impurities from the ore.
The metal extracted by the electrolytic reduction of its fused salt is: a) Sodium b) Calcium c) Magnesium d) Potassium
Answer: a) Sodium
Explanation: Sodium is extracted by the electrolytic reduction of its fused salt, sodium chloride. This process is known as the Downs process.
The process of converting an ore into its oxide by heating strongly in the presence of limited air is called: a) Roasting b) Calcination c) Smelting d) Reduction
Answer: a) Roasting
Explanation: Roasting is the process of converting an ore into its oxide by heating it strongly in the presence of limited air. It is used to remove volatile impurities and to facilitate the subsequent reduction of the oxide.
The metal used as the reducing agent in the extraction of aluminum from its ore is: a) Carbon b) Hydrogen c) Oxygen d) Nitrogen
Answer: a) Carbon
Explanation: Carbon is used as the reducing agent in the extraction of aluminum from its ore. The process is known as the Hall-Héroult process, where aluminum oxide is dissolved in molten cryolite and electrolyzed using carbon electrodes.
The process of converting an ore into its oxide by heating strongly in the presence of excess air is called: a) Roasting b) Calcination c) Smelting d) Froth flotation
Answer: a) Roasting
Explanation: Roasting is the process of converting an ore into its oxide by heating it strongly in the presence of excess air. It is used to remove volatile impurities and to facilitate the subsequent reduction of the oxide.
The metal that is extracted by the Mond process is: a) Silver b) Platinum c) Gold d) Nickel
Answer: d) Nickel
Explanation: The Mond process is used for the extraction of nickel. It involves the conversion of nickel oxide to pure nickel metal through the reaction with carbon monoxide gas.
The process of converting a metal oxide into metal using carbon as the reducing agent is called: a) Roasting b) Calcination c) Smelting d) Reduction
Answer: d) Reduction
Explanation: Reduction is the process of converting a metal oxide into metal by removing oxygen. Carbon is commonly used as a reducing agent in this process.
We hope there JEE MCQ of Class 12 : General Principles and Process of Isolation of Elements will help you to score an excellent rank in JEE Mains and Advanced. If you have any queries feel free to write in the comments section. We at Study Rate are always ready to serve our students.
