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प्रश्न
Name two reversible changes.
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उत्तर
Melting of ice.
Dissolving of salt in water.
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संबंधित प्रश्न
Fill in the blank.
Changes that occur in nature are called ........................
State whether the following is physical or chemical changes.
water cycle in nature —
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 3. a change that is made by humans | c. physical change |
| 4. a change in which the original substance cannot be obtained | d. periodic change |
| 5. a change where no new substance is formed | e. irreversible change |
| f . slow change |
State whether the following statement is true or false. If false write the correct statement.
Melting of butter and wax are examples of chemical changes.
Compare the energy changes involved during a physical and a chemical change.
Select the chemical changes from the following list of changes
The carbon cycle.
What is the difference between dissolution of sugar and burning of sugar ?
______ is the substance that is dissolved in a solvent.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Adding sugar to milk is a physical change.
