11. One day Reeta went to a jeweller's shop with her mother. Her mothers are an old gold jewellery to the goldsmith to polish. Neatzy when they brought the jewellery back, they found that there was a slight loss in its weight Can you suggest a reason for the loss in weight?
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Answer:
as the goldsmith polished it, a slight amount of the gold might have been rubbed off
Explanation:
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Answer:
The gold smith used aqua regia
Explanation:
Aqua regia is a mixture of Hydrochloric acid and Nitric acid and is capable of dissolving gold (something which neither of those acids can do alone). The jeweller used aqua regia which dissolved the outer layer of the jewellery revealing the shining clean gold underneath. In the process some gold was dissolved in the aqua regia and hence the loss in weight.
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