Question

One day rita 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 saw a slight loss in it,s weight. can you suggest a reason for the loss in weight ?

Answer 1

her gold Smith polished it it's upper layer has taken out by the brush that's why it was light.

Answer 2

The jeweller may dip the jewellery in the solution of acid, which reacts with the outer covering of metal. Thus there is a net loss of weight in the metal of the ornament.