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Science CBSE Homework Assignments
Class 7
Physical and chemical changes
Changes in reaction
1.
Physical change I
Question:
3
m.
1
.
__________ is the process in which new substance is formed.
Physical change
Cutting
Chemical change
Crushing of paper
2
.
Chemical change involves __________.
formation of new substance
reversible change
chopping of wood
no new substance formation
3
.
Burning is accompanied by __________.
heat
both smoke and heat
smoke
none of the above
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