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Science CBSE Homework Assignments
Class 7
Physical and chemical changes
Rusting & Crystallisation
2.
Rusting and Crystallisation I
Task:
2
m.
1.
Galvanisation is a process used to prevent the rusting of which of the following?
Iron
Aluminium
Copper
Zinc
2.
Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a -
Physical change that can be reversed
Chemical change that cannot be reversed
Chemical change that can be reversed
Physical change that cannot be reversed
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