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In Priestley's experiment, a candle burning in a closed bell jar soon went out, but did not go out when the jar also contained a
Your answer:
Correct answer: (c)
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Explanation
Why (c) is correct
In Priestley's bell-jar experiment, a mint plant kept with the candle restored the air, so the candle did not go out.
Why the other options are wrong
- (a) · your answer Water does not restore the air.
- (b) · your answer A lamp, like a candle, also uses up the air.
- (d) · your answer A mouse also spoils the air; it does not restore it.
NCERT point: Priestley's experiments showed that plants restore the air that a burning candle or a breathing animal spoils.
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Practise Photosynthesis in Higher Plants
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