write about any two examples of changes
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1. Reversible change
2. Irreversible change
3. Chemical change
4. Physical change
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There are 2 types of changes
1.Physical change
physical changes are those changes which occurs physically. they doesn't form a new substance. they are reversible.
Example:
burning of a candle
burning of magnesium ribbon
glowing of bulb
2. Chemical change
chemical changes are those change which occurs chemically. they can form a new substance. they are irreversible.
Example:
Burning a candle
Fermentation
Rusting of iron
1.Physical change
physical changes are those changes which occurs physically. they doesn't form a new substance. they are reversible.
Example:
burning of a candle
burning of magnesium ribbon
glowing of bulb
2. Chemical change
chemical changes are those change which occurs chemically. they can form a new substance. they are irreversible.
Example:
Burning a candle
Fermentation
Rusting of iron
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