One day Reeta went to a jeweller's shop with her mother. Her mother gave
an old gold jewellery to the goldsmith to polish. Next day 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:
aqua Regia
Explanation:
goldsmith use Aqua Regia and this is a reactive acid due to which it react with gold and give some less amount of gold after cleaning by Aqua regia