Question

one day Rita went to a jewellers shop with har mother. har mother give an old gold jewellery to the gold Smith to police next day when they brought the jewellery back they found that there was a slight lose in its weight can you suggest a reason for the loss in weight​

Answer 1

When gold is dipped in aqua regia the outer dull layer dissolves in aqua regia and the inner shiny layer appears. Due to this, some gold is lost during the polishing process. This causes the reduction in the weight.

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Answer 2

Answer:

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The gold jewellery is dipped into an acidic solution called aqua regia (a mixture of hydrochloric acid and nitric acid) for polishing. On dipping the gold jewellery in the acid solution, the outer layer of gold dissolves and the inner shiny layer appears. This causes a slight loss in its weight.