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Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).
Q.
Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.
- a)Electrochemical refining
- b)Mond’s process
- c)Zone refining method
- d)van Arkel method
Correct answer is option 'C'. Can you explain this answer?
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Impure metals are purified by different methods in order to remove the...
Zone refining (Fractional crystallisation). This method is employed for preparing extremely pure metals, e.g. germanium, silicon, boron, gallium and indium.
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Impure metals are purified by different methods in order to remove the...
Zone refining method is the most suitable method for obtaining highly pure solar grade silicon used as a semiconductor.
Zone refining is a purification technique that involves the repeated melting and solidification of a metal or semiconductor to remove impurities. It is based on the principle of fractional crystallization, where impurities are selectively partitioned into the molten zone and gradually moved along the ingot as it solidifies. This process results in a gradual purification of the material.
Here is a detailed explanation of the zone refining method for purifying solar grade silicon:
1. Principle of Zone Refining:
- Zone refining takes advantage of the fact that impurities have different solubilities in the molten and solid states of the material.
- The impurities tend to concentrate in the molten phase and move along the ingot as it solidifies, resulting in the formation of a purer solid phase.
2. Process:
- A rod of impure silicon is placed in a horizontal position and heated at one end to form a molten zone.
- The impurities dissolve in the molten silicon and migrate along the rod as it solidifies.
- The molten zone is moved along the rod in a controlled manner, usually by rotating the rod or moving it longitudinally.
- As the molten zone moves, impurities are gradually left behind in the solid phase, resulting in a purification of the silicon.
3. Purity Enhancement:
- The zone refining process is repeated multiple times to further enhance the purity of the silicon.
- Each pass of the molten zone removes a significant amount of impurities, resulting in a higher level of purity in the final product.
- The number of passes depends on the initial purity of the silicon and the desired level of purity.
4. Application in Solar Grade Silicon:
- Solar grade silicon used in the production of solar cells requires a high level of purity to ensure optimal performance.
- The zone refining method is well-suited for purifying silicon to the required purity levels.
- By carefully controlling the movement of the molten zone and repeating the process, impurities can be effectively removed, resulting in highly pure solar grade silicon.
In conclusion, the zone refining method is the most appropriate purification technique for obtaining highly pure solar grade silicon used as a semiconductor. It allows for the removal of impurities through fractional crystallization, resulting in a significant enhancement of purity.
Zone refining is a purification technique that involves the repeated melting and solidification of a metal or semiconductor to remove impurities. It is based on the principle of fractional crystallization, where impurities are selectively partitioned into the molten zone and gradually moved along the ingot as it solidifies. This process results in a gradual purification of the material.
Here is a detailed explanation of the zone refining method for purifying solar grade silicon:
1. Principle of Zone Refining:
- Zone refining takes advantage of the fact that impurities have different solubilities in the molten and solid states of the material.
- The impurities tend to concentrate in the molten phase and move along the ingot as it solidifies, resulting in the formation of a purer solid phase.
2. Process:
- A rod of impure silicon is placed in a horizontal position and heated at one end to form a molten zone.
- The impurities dissolve in the molten silicon and migrate along the rod as it solidifies.
- The molten zone is moved along the rod in a controlled manner, usually by rotating the rod or moving it longitudinally.
- As the molten zone moves, impurities are gradually left behind in the solid phase, resulting in a purification of the silicon.
3. Purity Enhancement:
- The zone refining process is repeated multiple times to further enhance the purity of the silicon.
- Each pass of the molten zone removes a significant amount of impurities, resulting in a higher level of purity in the final product.
- The number of passes depends on the initial purity of the silicon and the desired level of purity.
4. Application in Solar Grade Silicon:
- Solar grade silicon used in the production of solar cells requires a high level of purity to ensure optimal performance.
- The zone refining method is well-suited for purifying silicon to the required purity levels.
- By carefully controlling the movement of the molten zone and repeating the process, impurities can be effectively removed, resulting in highly pure solar grade silicon.
In conclusion, the zone refining method is the most appropriate purification technique for obtaining highly pure solar grade silicon used as a semiconductor. It allows for the removal of impurities through fractional crystallization, resulting in a significant enhancement of purity.
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Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer?
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Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer?.
Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer?.
Solutions for Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Impure metals are purified by different methods in order to remove the undesired impurities. These methods depend on the nature of metal and nature of impurities. Liquation is used for purifying metals with low melting points like Bi, Sn, Pb, Hg etc. Distillation is used for volatile metals like Zn, Cd, Hg. Cupellation is used to purify silver metal with lead impurities. Electrolytic refining (Cu, Ag, Mg, Al) Zone refining (Si, Ge, Ga) Mond’s process (Ni) van Arkel process (Zr, Ti).Q.Suggest a method of purification for obtaining highly pure solar grade silicon used as a semiconductor.a)Electrochemical refiningb)Mond’s processc)Zone refining methodd)van Arkel methodCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Class 12 tests.
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