Which of the following is not a chemical change?

مندرجہ ذیل میں سے کون سا کیمیائی تبدیلی نہیں ہے؟

Milk into curd

Dissolving sugar in water

Photosynthesis

Burning

Dissolving sugar in water is a physical change—no new substance is formed.

The sugar can be recovered by evaporation, showing it’s not a chemical reaction.