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?
To polish a gold ornament, it's miles dipped in a liquid known as aqua regia (a aggregate of hydrochloric acid and nitric acid). On getting the surroundings of aqua regia, the outer layer of gold dissolves and the internal vivid layer appears. The dissolving of the layer reasons a discount withinside the weight of the jewellery.
