Question

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:

Answer 1

True , true , true , assuming you meant can be observed:true , false

Answer 2

1. true
2.true
3.true
4.assuming you meant can be observed:true
5.false