Answer the questions in 1-2 sentences. "A jeweller melts gold and makes things like earrings, rings, and bangles from it." Q1. How do you think the jeweller melts gold? Q2. How does the melted gold become solid again?
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Question:
Q1. How do you think the jeweler melts gold?
Answer:
To melt gold, generally, an acid mixture aqua regia or royal water is used.
It is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3.
This chemical dissolves gold and is used to purify scrap containing gold.
Question :
Q2. How does the melted gold become solid again?
Answer:
Below 1,064 °C, gold is a solid. So, the jeweler brings down the temperature by letting it rest for several hours or by pouring water in it.
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