Question

Differentiate between Physical and Chemical change with examples (in points )​

Answer 1

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$\sim$ $\huge\underline\mathcal {Physical\:Change}$

$\implies$A physical change is a type of change in which the form of matter is altered but one substance is not transformed into another. The size or shape of matter may be changed, but no chemical reaction occurs. ... Note that whether a process is reversible or not is not truly a criterion for being a physical change.

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$\sim$ $\huge\underline\mathcal {Chemical\:Change}$

$\implies$a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance: The formation of rust on iron is a chemical change.

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$\implies$In a physical change, the molecules are rearranged while their actual composition remains same. In a chemical change, the molecular composition of a substance completely changes and a new substance is formed. Some example of physical change are freezing of water, melting of wax, boiling of water, etc.

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Answer 2

Answer:

The difference between a physical reaction and a chemical reaction is composition. In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.

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