Q.
The following set-up is called
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a
Engelmann experiment.
b
Jan Ingenhousz experiment
c
Priestley experiment.
d
Calvin experiment.
answer is C.
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Detailed Solution
The above experiment is related to Priestley's experiment. Joseph Priestley (1733-1804) in 1770 performed a series of experiments that revealed the essential role of air in the growth of green plants. Priestley observed that a candle burning in a closed space – a bell jar, soon gets extinguished. Similarly, a mouse would soon suffocate in a closed space. He concluded that a burning candle or an animal that breathe the air, both somehow, damage the air. But when he placed a mint plant in the same bell jar, he found that the mouse stayed alive and the candle continued to burn. Priestley hypothesised as follows: Plants restore to the air whatever breathing animals and burning candles remove.
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