What is physical and chemical changesWhat is its ifectsWhat is its needs to us
Subhasmita Sethy , 4 Years ago
Grade 7
7 grade science> What is physical and chemical changes Wha...
1 Answers
Apurva Sharma
Last Activity: 4 Years ago
PHYSICAL CHANGE:
- It is the change of matter wthout changing the chemical composition of matter.
- no bond is broken and no new bonds are formed
- no new products are formed
- 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:
- it is the change in chemical composition of matter
- bonds are broken and new bonds are also formed
- new products are formed
- 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.
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regards!
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