Question

3. Classify the following as physical and chemical changes: 2m
a. Cutting of trees
b. rusting of iron
c. Cooking of food
d. Melting of ice​

Answer 1

1. physical change
2. physical change
3. chemical change
4. physical chmage

Answer 2

Answer:

$\huge{\mathtt{\red{A}\pink{N}\green{S}\blue{W}\purple{E}\orange{R}}}$

$\huge{ \bold{ \underline{ \underline{Chemical\: changes:-}}}}$

• Cutting of trees
• Rusting of iron
• Cooking of food

All of the above have chemical changes because

• After cutting the tree we cannot get back the original tree from the wooden peaces
• When the iron rust, a new substance formed which is iron oxide so we can't get back the iron
• After the food cooked we can't get back the raw vegetables again because a new substance is formed and we can't reverse the process

$\huge{ \bold{ \underline{ \underline{Physical\: changes:-}}}}$

• Melting of ice

Melting of ice is a physical change because we can reverse the process. After melting of ice we can again make ice cubes from the water by freezing it.

$\small\red{\mid{\fbox{\tt{Hope it's helpful uh ♡♡}}\mid}}$