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Which of the following acid is used by gold smith for dissolving gold?
- a)Nitric acid
- b)Sulphuric acid
- c)Aqua regia
- d)Hydrochloric acid
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Which of the following acid is used by gold smith for dissolving gold?...
Aqua regia is used to dissolve gold and platinum.
This question is part of UPSC exam. View all Class 7 courses
Most Upvoted Answer
Which of the following acid is used by gold smith for dissolving gold?...
Aqua regia is used to dissolve gold.
Aqua regia is used by Goldsmith for dissolving gold...
hence correct answer is C.
Aqua regia is used by Goldsmith for dissolving gold...
hence correct answer is C.
Community Answer
Which of the following acid is used by gold smith for dissolving gold?...
Goldsmiths use Aqua Regia to dissolve gold.
Explanation:
Aqua regia is a mixture of nitric acid and hydrochloric acid. It is called the "royal water" because it can dissolve noble metals like gold and platinum. Goldsmiths use Aqua regia to dissolve gold because it is the only acid that can dissolve gold completely. Nitric acid and hydrochloric acid alone cannot dissolve gold.
The process of dissolving gold using Aqua regia involves the following steps:
1. Mixing the acids: Nitric acid and hydrochloric acid are mixed in a ratio of 1:3 to form Aqua regia.
2. Adding the gold: The gold is then added to the Aqua regia solution.
3. Dissolving the gold: Aqua regia dissolves the gold into a solution of gold chloride.
4. Filter the solution: The solution is filtered to remove any impurities.
5. Recovering the gold: The gold is then recovered from the solution by precipitation with a reducing agent like sodium metabisulfite.
In conclusion, Aqua regia is used by goldsmiths for dissolving gold because it is the only acid that can dissolve gold completely.
Explanation:
Aqua regia is a mixture of nitric acid and hydrochloric acid. It is called the "royal water" because it can dissolve noble metals like gold and platinum. Goldsmiths use Aqua regia to dissolve gold because it is the only acid that can dissolve gold completely. Nitric acid and hydrochloric acid alone cannot dissolve gold.
The process of dissolving gold using Aqua regia involves the following steps:
1. Mixing the acids: Nitric acid and hydrochloric acid are mixed in a ratio of 1:3 to form Aqua regia.
2. Adding the gold: The gold is then added to the Aqua regia solution.
3. Dissolving the gold: Aqua regia dissolves the gold into a solution of gold chloride.
4. Filter the solution: The solution is filtered to remove any impurities.
5. Recovering the gold: The gold is then recovered from the solution by precipitation with a reducing agent like sodium metabisulfite.
In conclusion, Aqua regia is used by goldsmiths for dissolving gold because it is the only acid that can dissolve gold completely.
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Which of the following acid is used by gold smith for dissolving gold?a)Nitric acidb)Sulphuric acidc)Aqua regiad)Hydrochloric acidCorrect answer is option 'C'. Can you explain this answer?
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Which of the following acid is used by gold smith for dissolving gold?a)Nitric acidb)Sulphuric acidc)Aqua regiad)Hydrochloric acidCorrect answer is option 'C'. Can you explain this answer? for Class 7 2024 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about Which of the following acid is used by gold smith for dissolving gold?a)Nitric acidb)Sulphuric acidc)Aqua regiad)Hydrochloric acidCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Class 7 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following acid is used by gold smith for dissolving gold?a)Nitric acidb)Sulphuric acidc)Aqua regiad)Hydrochloric acidCorrect answer is option 'C'. Can you explain this answer?.
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