Advertisements
Advertisements
प्रश्न
Select the chemical changes from the following list of changes
Boiling of milk.
Advertisements
उत्तर
Boiling milk is PHYSICAL change as no change in composition, temporary and reversible, no new substance with new properties is formed.
APPEARS IN
संबंधित प्रश्न
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
Write true or false
Burning of sugar is a temporary change.
Match the examples of changes in List I with the correct.
| List I | List II |
| 1. Expansion of a steel rod on heating | A: Physical change |
| 2. Rotting of eggs | B: Chemical change |
| 3. Milk turning sour | |
| 4. Tarnishing of copper | |
| 5. Separation of naphthalene from a mixture of naphthalene and sodium chloride. |
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
What type of change is colouring of a paper?
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Give two examples for the following case:
Physical changes which are reversible
