Question

classify the following changes as physical or chemical

1 Formation of clouds
2 turning a key to open a lock
3. boiling a potato
4. melting of wax
5. baking of bread
6. digestion of food
7. deflating of a cycle tyre tube
8. unripe green mangoes changing to yellow ripe mangoes

9. burning of an incense stick
10. glowing of iron when placed in a fire.​

Answer 1

Answer:

1. Formation of clouds-Physical Change
2. turning a key to open a lock- Physical Change
3. boiling a potato- Chemical Change
4. melting of wax- Physical Change
5. baking of bread- Chemical Change
6. digestion of food- Chemical Change
7. deflating of a cycle tyre tube- Physical Change
8. unripe green mangoes changing to yellow ripe mangoes - Chemical Change
9. burning of an incense stick-Chemical Change
10. glowing of iron when placed in a fire-Physical Change

Please mark me as the brainliest

Answer 2

Answer:

a) physical

b) physical

c) physical ( there is no change in its chemical structure)

d) physical

e) physical (burning is a chemical change but baking is not)

f) chemical

g) physical

h) chemical (I'm not sure)

i) chemical ( when you burn it smoke and Ash come out)

j) physical