Q.

Choose the correct statement.

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a

Joseph Priestly showed the release of oxygen in photosynthesis

b

Joseph Priestly hypothesised through his experiments as: Plants restore to the air whatever breathing animals and burning candle remove.

c

Jan Ingenhousz discovered oxygen.

d

T. W. Engelman used Chlorella to show that release of more oxygen in its photosynthesis takes place in blue and red region of visible spectrum.

answer is B.

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Detailed Solution

Release of oxygen from green parts of the plant in the presence of light was shown by Jan Ingenhousz in an aquatic plant. Engelman used Cladophora (actually Spirogyra) in his experiments to show that red and blue spectral components of visible light are mainly involved in photosynthesis and gave the action spectrum of photosynthesis.

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