Chemical change takes place only when matter changes to become entirely different kind of matter. Which one of the following is not a chemical change?
کیمیائی تبدیلی تب ہی ہوتی ہے جب معاملہ مکمل طور پر مختلف قسم کے مادے بننے کے لئے تبدیل ہوتا ہے۔ مندرجہ ذیل میں سے کون سا کیمیائی تبدیلی نہیں ہے؟
Answer: Dry Ice sublimation
Explanation
Dry ice sublimation is a physical change where solid CO₂ directly turns into gas without changing its chemical composition.
Rusting of iron, burning of wood, and cooking of egg are all chemical changes, where new substances are formed.
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