MEDIUM
Earn 100

Draw any two things that give out smoke. How do you think smoke make affect us?
Important Questions on Air Around Us

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Explain why a burning candle stops burning after some time when covered with an inverted gas jar.

EASY
Argon, Carbon dioxide, Oxygen, Nitrogen, Helium

MEDIUM

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MEDIUM

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HARD
Study the picture and answer the questions.
(i) Will the flame of the candle go out at once? Why or why not?
(ii) Will the water start boiling after some time? Why or why not?
(iii) Will the candle flame go out after some time? Why or why not?
(iv) If you hold the inverted glass jar so that it covers the candle flame but its rim is above the water level, what will happen?

EASY
