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What is physical and chemical changes What is its ifects What is its needs to us

What is physical and chemical changes
What is its ifects
What is its needs to us

Grade:7

1 Answers

Apurva Sharma
214 Points
10 months ago
PHYSICAL CHANGE:
  1. It is the change of matter wthout changing the chemical composition of matter.
  2. no bond is broken and no new bonds are formed
  3. no new products are formed
  4. its usually reversible
physical changes are important as they do not change te molecule or substance to other.
e.g. water as ice,liquid,and vapours are the three physical state.
  this physical change helps to separate water from other non volatile substance by boiling
 
CHEMICAL CHANGE:
  1. it is the change in chemical composition of matter
  2. bonds are broken and new bonds are also formed
  3. new products are formed
  4. it can be reversible or irreersible
chemical changes help us study the properties of matter and make new or desired substances from other substances.
e.g hydrogen and nitrogen are reacted to form ammonia
 
hope you got the answer.
do hit like
regards!
 

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