ICSE Class 7 Chemistry
Question 8 of 13
Physical and Chemical Changes — Question 10
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Question Question 10
Photosynthesis is a natural process by which green plants manufacture food in the presence of sunlight.
(a) Are any new products formed during the above process?
(b) Can the change be reversed or is irreversible?
(c) State the conclusions which can be drawn, to represent photosynthesis as a physical or a chemical change.
(a) Glucose and oxygen are formed during photosynthesis. Hence, new products are formed.
(b) Carbon dioxide and water cannot be obtained back, from glucose, hence, the change is irreversible.
(c) Photosynthesis is a chemical change as it is irreversible and leads to the formation of new products.