Question

One day Rita went to a Jeweller shop with her mother he her mother gave an old jewellery to the goldsmith to polish next day when they bought 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:

to polish an ornament , the goldsmith dips it in an acidic solution called aqua regia, which is a mixture of HCl and HNO3. this soln. has the property of dissolving gold,which results in the reduction of the ornament's weight

Answer 2

Answer:

In order to polish the gold ornament, it is to be dipped into a liquid called aqua regia (a mixture of hydrochloric acid and nitric acid). On getting dissolved in the environment of aqua regia, the outer layer of gold dissolves and an inner shiny layer appears. The dissolving of the layer causes a reduction in the weight of the jewellery.