Question

Pick out the chemical changes from the following.​
I : Condensation
II : Photosynthesis
III : Evaporation​
IV : Cooking
V : Melting

• A. II, III, V
• B. II, III
• C. I, IV, V
• D. II, IV

Answer 1

The correct option is D II, IV

A chemical change is a permanent change as the new substance(s) formed have a different composition than the original substance(s).​

• Condensation is the change of physical state of matter from gas to liquid.​

• Photosynthesis is a chemical change as it involves a chemical reaction. Carbon dioxide and water combine to form glucose and oxygen.​

• Evaporation is the change of physical state of matter from liquid to gas.​

• Cooking is a chemical change wherein the raw material(s) get permanently transformed into cooked food (new substance)​.

• Melting is the change of physical state of matter from solid to liquid.​

So, the answer is (ii) and (iv).​