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Which of the following is not used for obtaining Ag
- a)As a side product in electrolytic refining of copper.
- b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.
- c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.
- d)By heating Na[Ag(CN)2]
Correct answer is option 'D'. Can you explain this answer?
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Which of the following is not used for obtaining Aga)As a side product...
D) By heating Na[Ag(CN)2]
Explanation:
This option refers to the heating of sodium dicyanoargentate(I), Na[Ag(CN)2], to obtain silver. However, this method is not commonly used to obtain silver. Let's understand why.
1. Electrolytic refining of copper:
- In the electrolytic refining of copper, impure copper is used as an anode, and pure copper is used as a cathode.
- During electrolysis, copper ions from the impure copper anode migrate towards the cathode and get deposited. At the same time, other impurities present in the anode also get removed.
- The impurities that get removed settle down at the bottom of the electrolytic cell and are known as anode sludge.
- This anode sludge contains various metals, including silver, gold, platinum, and palladium, as by-products of the copper refining process.
- The anode sludge is further processed to extract these precious metals, including silver.
2. Parkes process:
- The Parkes process is a method used to extract silver from lead during the refining process.
- In this process, molten lead containing silver is treated with zinc.
- The addition of zinc forms a zinc-silver alloy, known as dore metal, which floats on top of the molten lead.
- The dore metal is then skimmed off and further processed to separate the silver from the zinc.
3. Reaction of silver sulphide with KCN:
- Silver sulfide (Ag2S) is a common compound of silver found in nature.
- It can be reacted with potassium cyanide (KCN) to form a soluble complex, potassium dicyanoargentate(I) (K[Ag(CN)2]).
- This soluble complex can then be reacted with zinc to obtain silver.
4. Heating Na[Ag(CN)2]:
- Sodium dicyanoargentate(I) (Na[Ag(CN)2]) is a compound that can be formed by the reaction of silver nitrate (AgNO3) with sodium cyanide (NaCN).
- However, heating Na[Ag(CN)2] is not a commonly used method to obtain silver. It may result in the decomposition of the compound and the release of toxic gases like hydrogen cyanide (HCN).
- Therefore, this method is not preferred for the extraction of silver.
In conclusion, heating Na[Ag(CN)2] is not used for obtaining silver due to the potential release of toxic gases. The other options mentioned in the question are commonly used methods for obtaining silver as by-products or through specific chemical reactions.
Explanation:
This option refers to the heating of sodium dicyanoargentate(I), Na[Ag(CN)2], to obtain silver. However, this method is not commonly used to obtain silver. Let's understand why.
1. Electrolytic refining of copper:
- In the electrolytic refining of copper, impure copper is used as an anode, and pure copper is used as a cathode.
- During electrolysis, copper ions from the impure copper anode migrate towards the cathode and get deposited. At the same time, other impurities present in the anode also get removed.
- The impurities that get removed settle down at the bottom of the electrolytic cell and are known as anode sludge.
- This anode sludge contains various metals, including silver, gold, platinum, and palladium, as by-products of the copper refining process.
- The anode sludge is further processed to extract these precious metals, including silver.
2. Parkes process:
- The Parkes process is a method used to extract silver from lead during the refining process.
- In this process, molten lead containing silver is treated with zinc.
- The addition of zinc forms a zinc-silver alloy, known as dore metal, which floats on top of the molten lead.
- The dore metal is then skimmed off and further processed to separate the silver from the zinc.
3. Reaction of silver sulphide with KCN:
- Silver sulfide (Ag2S) is a common compound of silver found in nature.
- It can be reacted with potassium cyanide (KCN) to form a soluble complex, potassium dicyanoargentate(I) (K[Ag(CN)2]).
- This soluble complex can then be reacted with zinc to obtain silver.
4. Heating Na[Ag(CN)2]:
- Sodium dicyanoargentate(I) (Na[Ag(CN)2]) is a compound that can be formed by the reaction of silver nitrate (AgNO3) with sodium cyanide (NaCN).
- However, heating Na[Ag(CN)2] is not a commonly used method to obtain silver. It may result in the decomposition of the compound and the release of toxic gases like hydrogen cyanide (HCN).
- Therefore, this method is not preferred for the extraction of silver.
In conclusion, heating Na[Ag(CN)2] is not used for obtaining silver due to the potential release of toxic gases. The other options mentioned in the question are commonly used methods for obtaining silver as by-products or through specific chemical reactions.
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Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. Can you explain this answer?
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Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. 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 Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. 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 Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. Can you explain this answer?.
Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. 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 Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. 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 Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. Can you explain this answer?.
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Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following is not used for obtaining Aga)As a side product in electrolytic refining of copper.b)Parke's process in which Zn is used to extract silver by solvent extraction from molten lead.c)By reaction of silver sulphide with KCN and then reaction of soluble complex with Zn.d)By heating Na[Ag(CN)2]Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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