Question

11. 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?​

Answer 1

Answer:

The goldsmith polished the gold with aqua regia, the only chemical which can dissolve gold in it. In the reaction some of the gold got dissolved so there is a loss in weight.

Answer 2

Answer:

The jewellery lose its weight because goldsmith uses aquarigia to polish the jewellery and aquarigia have the capacity to dissolve gold . This is the reason why gold jewellery loses its weight when polished .