Advertisements
Advertisements
Question
Give four difference between physical and chemical changes.
Solution
The differences are Physical and Chemical Changes:
Physical change
- In a physical change no new substance is formed and the chemical composition of substance remains same. There are changes only in physical properties and state.
- Temporaiy change which can be reversed by simple physical methods.
- Weight of original substance doesn’t change
- Energy like heat, light etc. may or may not be absorbed or released
Chemical change
- In a chemical change new substance with entirely different chemical composition and properties is formed.
- Permanent change and irreversible
- Weight of original substances may increase or decrease
- Energy like heat, light etc. are given out or absorbed.
APPEARS IN
RELATED QUESTIONS
Classify the following as chemical or physical change:
Boiling of water to form steam.
Write true or false for the statement.
Burning of paper and formation of curd are reversible changes
Write short answer.
Sublimation is classified as a physical change. Why ?
State the differences between a physical change and a chemical change.
State whether the following is physical or chemical changes.
lightning —
State whether the following is physical or chemical changes.
Slaking of lime —
Classify the following as physical or chemical change :
Condensation of steam
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
Wood to sawdust:______:: Wood to Ash: Chemical change
Give an example of a physical change in which the color of the substance changes.
