Ques-1 Write true and false for the following :-
1)tearing of paper is a physical change
2)...
Ques-1 Write true and false for the following :-
1)tearing of paper is a physical change
2) The presence of oxygen and water is necessary for rusting of iron
3) Copper is more reactive than iron
4) A physical change can we reserved.
5) In a chemical change ,no new substance is formed
Ques-2 Complete the analogies.
1) Acetic acid:vinegar:: lime water.
2) Copper sulphate : blue vitriol:: green vitriol
3) Physical change: :: chemical change:permanent
4) Oxide of iron: : : oxide of magnesium :MgO
5) Saline water: salt water :: soda water:
Answers: 1
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