Question

2 One day Zaheen went to a Jeweller's shop with her mother. Her mother gave old gold jewellery to the
goldsmith to polish. Next day when they brought the jewellery back they found that there was a loss in its
weight Can you suggest a reason for the loss in weight?​

Answer 1

Answer:

Bczz jewellers use very strong acid which can even dissolve gold.They use AQUA REGIA to polish gold although gold does not react with acids but such acids result in loss of gold during polishing process.

Explanation:

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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.