a man went door to door posing as a goldsmith he promised to bring back the letter of old and gold ornaments aspecting lady gave a set of gold bangles to him which he dipped in a particular solution the bangles par click on you but their weight was reduced drastically the lady was upset but after a few arguments man beat a hasty retreat can you play a detective to find out the nature of solution hadused
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Copper is used to make hot water tanks and not steel this is because the iron (in steel) is more reactive than then copper also it react with hot steam to produce ferrosoferric oxide. Due to which the body of tank will become weaker and weaker. While copper does not react with hot water
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He must have dipped the gold metal in the solution of aqua regia − a 3:1 mixture of conc. HCl and conc. HNO3. Aqua regia is a fuming, highly corrosive liquid. It dissolves gold in it. After dipping the gold ornaments in aqua regia, the outer layer of gold gets dissolved and the inner shiny layer appears. That is why the weight of gold ornament reduced.
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