Question

What kind of change is there in the following activities: physical or chemical?
(a) sharpening a pencil
(b) burning a matchstick
(C) curdling of milk by adding lemon juice
(d) cutting potatoes into small pieces​

Answer 1

Answer:

1. physical
2. physical
3. chemical
4. physical

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Answer 2

Answer:

a) Physical Change

b) Chemical Change

c) Coagulation (curdling of milk is chemical change.)

d) Physical Change...