1.

one day Rita went to a Jewellers shop with her mother her mother gave an old gold jewelry 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

Answer»

To polish a GOLD jwellery it is DIPPED in a liquid called aquea regia. After DIPPING in it the outer layer of gold dissolved and INNER shinny layer appears. The DISSOLVING of jwellery in a liquid cause reduction of it's weight.



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