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Observing More Examples of Reversible & Irreversible Changes- 2 Video Lecture - Class 6
FAQs on Observing More Examples of Reversible & Irreversible Changes- 2 Video Lecture - Class 6
| 1. What are reversible changes? |  |
Ans. Reversible changes are changes that can be undone or reversed, meaning that the original substances can be obtained again. These changes usually involve physical processes such as melting, boiling, or dissolving, where the substances can return to their original state by reversing the process.
| 2. What are irreversible changes? | |
Ans. Irreversible changes are changes that cannot be undone or reversed, meaning that the original substances cannot be obtained again. These changes usually involve chemical processes such as burning, rusting, or cooking, where new substances are formed and cannot be converted back to the original ones.
| 3. Give an example of a reversible change. | |
Ans. An example of a reversible change is the melting of ice. When heat is applied to ice, it melts and turns into water. If the heat is removed, the water freezes and turns back into ice. This process can be repeated multiple times, making it a reversible change.
| 4. Provide an example of an irreversible change. | |
Ans. An example of an irreversible change is the burning of paper. When paper is set on fire, it undergoes a chemical reaction and turns into ash, smoke, and gases. These new substances cannot be converted back into paper, making the burning of paper an irreversible change.
| 5. Can physical changes be reversible or irreversible? | |
Ans. Physical changes can be both reversible and irreversible. Reversible physical changes involve changes in state or shape that can be reversed by reversing the process. For example, melting and freezing are reversible changes. On the other hand, irreversible physical changes involve changes in state or shape that cannot be reversed, such as breaking a glass or tearing a piece of paper.
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