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From gold amalgam, gold may be recovered...

From gold amalgam, gold may be recovered by:

A

Distillation

B

Oxidation

C

Electrolytic refining

D

Dissolving in `HNO_3`

Text Solution

AI Generated Solution

The correct Answer is:
To recover gold from gold amalgam, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding Amalgam**: - Amalgam is an alloy formed by mixing a metal (in this case, gold) with mercury. 2. **Scraping Off the Amalgam**: - The first step in recovering gold is to scrape off the gold amalgam. This involves physically separating the amalgam from any other materials. 3. **Heating the Amalgam**: - The scraped amalgam is then subjected to heat. This heating causes the mercury to evaporate. 4. **Evaporation of Mercury**: - As the amalgam is heated, the mercury component evaporates due to its lower boiling point compared to gold. 5. **Condensing the Evaporated Mercury**: - The evaporated mercury is then collected and condensed back into liquid form. This allows for the mercury to be reused in future amalgamation processes. 6. **Separation of Gold**: - After the evaporation of mercury, gold remains as a solid residue. This solid gold can then be collected and further purified if necessary. 7. **Conclusion**: - The entire process described above is known as **distillation**, as it involves heating a mixture to separate components based on their boiling points. ### Final Answer: Gold may be recovered from gold amalgam by **distillation**. ---
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