Advertisements
Advertisements
प्रश्न
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Advertisements
उत्तर
Freezing of water is reversible change as on heating frozen ice changes to water by heating.
Burning of a candle is irreversible change as on reversing the conditions we can not get candle back out of CO2, water vapours and wax vapours.
APPEARS IN
संबंधित प्रश्न
What role does energy play in initiating a chemical change ?
Define physical change. Give two examples for the above changes.
What are reversible and irreversible changes ? Give one example for each.
State whether the following is physical or chemical changes.
water cycle in nature —
Write true or false
Rusting of iron is a chemical change.
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Select the chemical changes from the following list of changes
Breaking of glass
