Classify the following as chemical or physical changes:
• cutting of trees,
• melting of butter in a pan,
• rusting of almirah,
• boiling of water to form steam,
• passing of electric current, through water and the water breaking down into hydrogen and oxygen gases,
• dissolving common salt in water,
• making a fruit salad with raw fruits, and
• burning of paper and wood.
Physical change: There is no change in the chemical nature of substance. Only state change. for example: ice - water - water vapour.
Chemical change: A substance reacts with another substance and makes a new substance. It is an irreversible reaction.
• Physical change
• Physical change
• Chemical change (hydrated iron oxide)
• Physical change
• Chemical change
• Physical change
• Physical change
• Physical change (Co2, smoke, water vapour, ash)
NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:
Welcome to the NCERT Solutions for Class 9 Science - Chapter . This page offers a step-by-step solution to the specific question from Excercise 4 , Question 1: Classify the following as chemical or physical changes: • cutting of trees, • melting ....
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