Reversible And Irreversible Changes

1. Identify the change.

Reversible

Irreversible

The given answer "irreversible" suggests that the change being referred to cannot be undone or reversed. This means that once the change occurs, it is permanent and cannot be changed back to its original state.

Explanation

The given answer "irreversible" suggests that the change being referred to cannot be undone or reversed. This means that once the change occurs, it is permanent and cannot be changed back to its original state.

2. Burning of paper is ___________ change.

Irreversible

Reversible

When paper is burned, it undergoes a chemical reaction that results in the formation of new substances, such as ash and smoke. This change is irreversible because it cannot be undone or reversed. Once the paper is burned, it cannot be restored back to its original form. Therefore, the correct answer is irreversible.

Explanation

When paper is burned, it undergoes a chemical reaction that results in the formation of new substances, such as ash and smoke. This change is irreversible because it cannot be undone or reversed. Once the paper is burned, it cannot be restored back to its original form. Therefore, the correct answer is irreversible.

3. Identify this change.

Reversible

Irreversible

The term "reversible" refers to a change that can be undone or reversed. In the context of this question, it is likely asking about a change that can be easily reversed or undone. This means that whatever process or transformation is being referred to can be reverted back to its original state without any permanent effects or consequences.

Explanation

The term "reversible" refers to a change that can be undone or reversed. In the context of this question, it is likely asking about a change that can be easily reversed or undone. This means that whatever process or transformation is being referred to can be reverted back to its original state without any permanent effects or consequences.

4. Identify the change

Reversible

Irreversible

The term "reversible" refers to a change that can be undone or reversed, meaning it can return to its original state. On the other hand, "irreversible" signifies a change that is permanent and cannot be undone. Therefore, the correct answer "reversible" indicates that the change being referred to can be reversed or undone.

Explanation

The term "reversible" refers to a change that can be undone or reversed, meaning it can return to its original state. On the other hand, "irreversible" signifies a change that is permanent and cannot be undone. Therefore, the correct answer "reversible" indicates that the change being referred to can be reversed or undone.

5. Identify the change.

Reversible

Irreversible

The given question asks to identify the change. The options provided are "reversible" and "irreversible". The correct answer is "irreversible". This suggests that the change being referred to is not reversible, meaning it cannot be undone or reversed.

Explanation

The given question asks to identify the change. The options provided are "reversible" and "irreversible". The correct answer is "irreversible". This suggests that the change being referred to is not reversible, meaning it cannot be undone or reversed.

6. Melting of butter is a ____________ change.

Reversible

Irreversible

Melting of butter is a reversible change because it can be easily reversed by cooling the melted butter, causing it to solidify again. This change is purely physical, as the chemical composition of the butter remains the same before and after melting.

Explanation

Melting of butter is a reversible change because it can be easily reversed by cooling the melted butter, causing it to solidify again. This change is purely physical, as the chemical composition of the butter remains the same before and after melting.

7. Burning of candle wax is a _______ change.

Reversible

Irreversible

The burning of candle wax is an irreversible change because once the wax is heated and ignited, it undergoes a chemical reaction with oxygen in the air, resulting in the formation of new substances such as carbon dioxide and water vapor. These new substances cannot be easily converted back into wax, making the change irreversible.

Explanation

The burning of candle wax is an irreversible change because once the wax is heated and ignited, it undergoes a chemical reaction with oxygen in the air, resulting in the formation of new substances such as carbon dioxide and water vapor. These new substances cannot be easily converted back into wax, making the change irreversible.