Question

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science one​

Answer 1

1. the change which can be reversed is known as reversible change

2. heat is the cause for the change

3 a. changing of milk is a chemical change and is non reversible

b. hot milk becoming cold milk is a physical change and can be reversed

4 a. irrreversible

b.reversible

c.irreversible

d. reversible

5. no these changes are not same. burning of wick is irreversible and chemical change and melting of wax is reversible and physical change

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Answer 2

Answer:

1. A reversible change is a chemical change where no new materials are created and the original material can be recovered. Examples include freezing water to make ice or melting chocolate.
2. Ice melt to form water due to difference between heat between ice and surrounding , If surrounding heat is more than ice then its melt to water , at melting temperature not change , it change due to change its heat.
3. a. it occurs due to the microorganism ( lactobacilus). b. it occurs due temperature changes.
4. 1. irreversible 2. reversible 3. irreversible 4. reversible
5. Burning of wick is a chemical change while melting of wax is a physical change since it can be brought back to the way it was. So, no. These changes aren't similar.

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