b)
10. Saloni took a piece of burning charcoal and collected the gas evolved in a
test tube.
(a) How will she find the nature of the gas ?
Write down word equations of all the reactions taking place in this
process.
11. One day Reeta went to a jeweller's shop with her mother. Her mother gave
an old gold jewellery 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?
Extended Learning
Activities and Projects
Prepare Index Cards for any four metals and four non-metals. The
card should have information like name of metal/non-metal: its
physical properties. chemical properties and its uses.
Visit a blacksmith and observe how metals are moulded.
3.
Suggest an experiment to compare the conductivity of electricity by
iron, copper, aluminium and zinc. Perform the experiment and
nremare a short report on the results.
Answers
Answered by
1
Answer:
11. Polishing gets the gold dust to fall
Explanation:
Causing the weight loss
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