One day Reeta went to a jewellers shop with her mother. Her mother gave an old gold jewellery to the goldsmith to polish. The goldsmith asked them to wait for sometime. They noticed that the goldsmith had dipped the jewellery in a solution. They did not know that it was aqua regia. Aqua regia has 3 parts of HCl(Hydrochloric acid) and 1 part of Nitric acid in it. When they got the jewellery back they found that there was a slight loss in its weight. Answer these questions 23) What is aqua regia? 24 Why did the gold jewellry lose weight? 25)Name one more noble metal which will dissolve in aqua regia? 26)Where is Gold and Platinum in the Reactivity series of metals?
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