5 physical change and 5 chemical change
please neme them with their formula
Answers
Answer:
Classify the following as chemical or physical changes: a Cutting of trees b Melting of butter in a pan c Rusting of almirah d Boiling of water to form steam e Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases f Dissolving common salt in water g Making a fruit salad with raw fruits h Burning of paper and wood
Answer:
Physical change – A substance is said to undergo a physical change when only the physical properties such as the shape, size, colour, state or appearance of the substance change. Its chemical composition remains intact.
Chemical change – A substance is said to undergo a chemical change when the chemical properties of a substance alter. As a result, there is either formation or breaking of atomic bonds at the molecular level.
a Cutting of trees – Physical change
b Melting of butter in a pan – Physical change
c Rusting of almirah – Chemical change
d Boiling of water to form steam – Physical change
e Passing of electric current through water and the water breaking down into hydrogen and oxygen gases – Chemical change
f Dissolving common salt in water – Physical change
g Making a fruit salad with raw fruits – Physical change
h Burning of paper and wood – Chemical change
Answer:
breaking glass
boiling,melting freezing,cutting a papper,
and chemical changes are
Explanation:
rusting ,burning of wood
formation of curd,acid base reaction,digestion of food