Question

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A chemical change is also called a chemie
reaction. Original substances participating in
chemical reaction are known as the reactan
and the new substances formed are know
During a chemical change, the molecules
PHYSICAL AND CHEMICAL CHANGES
substances with different chemical properties
You have read about physical and chemical
changes in the previous class. A change is
said to be physical or chemical depending on
whether new substances are formed or not,
In a physical change, a substance undergoes the products,
changes only in its physical properties such
as shape, sive, colour and state, and no new of the reactants undergo changes to fors
substances are formed. Examples are freezing molecules of the products. Thus, during
of water, melting of wax, tearing of paper,
chemical reaction, substances undergo chemics
and boiling of water to form steam. Some of transformation to form new substances,
these are reversible changes whereas others are
Chemical reactions take place around us
Irreversible.
all the time. Burning of fuel, cooking of food,
A chemical change occurs when two rusting of iron, process of photosynthesis,
substances react chemically to form new digestion of food, etc. are all processes where
ACCO
sentence change into hindi​

Answer 1

Explanation:

not known

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