Question

Q1One 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?
Chemistery ques lol sorry

Answer 1

Explanation:

The gold jewellery must be dipped in a liquid called aqua regia, that is a mixture of hydrochloric and nitric acid, to polish it. When gold is dissolved in aqua regia, the outer layer of gold dissolves and a shiny inner layer shows. The weight of the jewellery is reduced due to the layer’s dissolution.