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Subjects
Science State Board
Class 8
Changes around us
Textbook questions
1.
Choose the best answer I
Exercise condition:
4
m.
1.
Burning of paper is a __________ change.
physical
neutral
chemical
physical and chemical
2.
Burning of matchstick is an example for chemical reaction caused by __________.
contact in physical states
catalyst
electricity
light
3.
__________ undergoes rusting.
Copper
Tin
Iron
Sodium
4.
The pigment responsible for browning of apples is __________.
melanin
hydrated iron (II) oxide
ozone
starch
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