Classify the following as chemical or physical changes: (a) Cutting of trees (b) Melting of butter in a pan (c) Rusting of almirah (d) Boiling of water to form steam (e) Passing of electric current, through water and the water breaking down into hydrogen and oxygen gases (f) Dissolving common salt in water (g) Making a fruit salad with raw fruits (h) Burning of paper and wood

Answer:

Chemical change – A substance is said to undergo a physical change when only the physical properties such as the shape, size, colour, state or appearance of the substance change. Its chemical composition remains intact.

Physical change – A substance is said to undergo a chemical change when the chemical properties of a substance alter. As a result, there is either formation or breaking of atomic bonds at the molecular level.

(a) Cutting of trees – Physical change
(b) Melting of butter in a pan – Physical change
(c) Rusting of almirah – Chemical change
(d) Boiling of water to form steam – Physical change
(e) Passing of electric current through water and the water breaking down into hydrogen and oxygen gases – Chemical change
(f) Dissolving common salt in water – Physical change
(g) Making a fruit salad with raw fruits – Physical change
(h) Burning of paper and wood – Chemical change

Was this answer helpful?

  
   

4 (53)

Upvote (68)

Choose An Option That Best Describes Your Problem

Thank you. Your Feedback will Help us Serve you better.

Leave a Comment

Your Mobile number and Email id will not be published. Required fields are marked *

*

*

BOOK

Free Class

Ask
Question