Question

1) give two examples to show that changes can be observed by their effects.
2) why is the germination of a seed a chemical change?
3) write a short note on chemical reactions.
4) powdering of sugar is physical change. how can u justify this statement?
5) all physical changes are reversible and only chemical changes are irreversible. do u agree? give reasons and examples.

chemistry plzz answer full questions


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Answer 1

2 because every living organisms undergo chemical reactions to grow and mature.

3 reactions in which a substance or a group of substance undergoes change in physical properties as well as chemical composition which can not be reversed by physical means.

4 because there is no change in chemical composition only physical appetance changes

5 yep i agree for eg. the melted ice acan be freezed again to solidify it.
but a rusted iron can not be purified again by any physical means.

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Answer 2

Answer:

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