Chemistry, asked by rishim0008, 11 months ago

need help!!
i have exam today !!

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Answered by sanwer2004
2

Answer:

photosynthesis is a chemical change as a new substance glucose is formed through this process and the constituents of the original substance cannot be brought back by any means....

Answered by mraryan5
1

Answer:

c) Yes the valency of calcium is +2 because it is electropositive in Nature

a)They are chemical changes because their reactants and products cant change

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