Question

(i) Fill in the blanks in the following equations of two chemical reactions:
(a) __________ + 12H₂O $\stackrel{\mathrm{Light}\mathrm{energy}}{\to }$ C₆H₁₂O₆ + __________ + __________
(b) __________ 6O₂ $\stackrel{\mathrm{Chlorophyll}}{\to }$ 6__________ + 6__________ + Energy
(ii) Name the two processes represented by the above two reactions.
(iii) State any two differences in these processes other than those already indicated in the reactions.
(iv) Which one of these two reactions is the supporter of all life on earth?

Answer 1

(i) (a) 6CO₂ + 12H₂O $\underset{\mathrm{Chlorophyll}}{\overset{\mathrm{Light}\mathrm{energy}}{\to }}$ C₆H₁₂O₆ + 6O_{2 +} 6H₂O
−−−−−
(b) C₆H₁₂O_{6 +} 6O₂ $\stackrel{}{\to }$ 6CO₂ + 6H₂O + Energy

(Note: There is a printing mistake in the book in part (b))

(ii) Photosynthesis and respiration are represented by the above two reactions.

(iii) Photosynthesis takes place in green plants only, whereas respiration takes place in all living organisms.

(iv) Photosynthesis (reaction (a)) is the supporter of all the life on the Earth.