Question

2. One day Zaheen went to a Jeweller's shop with her mother. Her mother gave old gold jewellery to the
goldsmith to polish. Next day when they brought the jewellery back they found that there was a loss in its
weight. Can you suggest a reason for the loss in weight?
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Answer 1

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The jewellery were less in weight compared to the previous day, since the goldsmith would have used a mixture of 3 parts of HCl and one part of HNO₃, also called aqua regia (meaning holy water), which dissolves many metals, even the most stable gold and platinum.

Answer 2

Yes because the chemical they use for polishing is AQUAREGIA which can dissolve even gold