Ncert solutions

Ncert solutions

Grade 8

Materials: Metals and Non-Metals | Exercise

Question 11

Q11) One day Reeta went to a jeweler’s shop with her mother. Her mother gave old gold jewelry to the goldsmith to polish.

The next day when they brought the jewelry back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss of weight?

Solution:

  • In the jeweler’s shop, to polish gold jewelry it is dipped in an acid called Aqua Regia.
  • Aqua Regia dissolves the outer layer of gold.
  • So, the inner shiny layer is visible.
  • As there is a loss of the outer layer there is a slight loss in its weight.

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subject-cta

Question 11

Q11) One day Reeta went to a jeweler’s shop with her mother. Her mother gave old gold jewelry to the goldsmith to polish.

The next day when they brought the jewelry back, they found that there was a slight loss in its weight. Can you suggest a reason for the loss of weight?

Solution:

  • In the jeweler’s shop, to polish gold jewelry it is dipped in an acid called Aqua Regia.
  • Aqua Regia dissolves the outer layer of gold.
  • So, the inner shiny layer is visible.
  • As there is a loss of the outer layer there is a slight loss in its weight.

Still have questions? Our expert teachers can help you out

Book a free class now

Want to top your science exam ?

Learn from an expert tutor.

Book a free class now
subject-cta
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