A type of change that can be returned to its original form by reversing the conditions?

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Solution

A physical change occurs when nothing new is formed.
It's a transformation that merely modifies a substance's appearance, not its chemical content.
This type of transformation is reversible.
For instance, ice melting, water freezing, and so on.
A change in which the substance can get back to its original form is called a physical change.

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Question 8

Paheli’s mother made a concentrated sugar syrup by dissolving sugar in hot water. On cooling, crystals of sugar got separated. This indicates a:
(a) physical change that can be reversed
(b) chemical change that can be reversed
(c) physical change that cannot be reversed
(d) chemical change that cannot be reversed

Q. When a change can be reversed, meaning when we can get back the original product, it is a reversible change.

"A change can be reversed by changing the condition". give an example to support the statement.

Q. Matter undergoes a change. The changes are of two types: Physical and chemical change.

A physical change is a change that involves only a change in the physical state of matter. Its chemical properties remain the same. Usually increasing the temperature or applying pressure or both bring about a physical change. On reversing the condition, that is reducing the temperature or reducing the pressure or both, the original state of matter is restored. In other words, physical changes are reversible.

A chemical change is a change that involves a change in the chemical composition of matter. A new substance is formed. In a chemical change, new chemical and physical properties of the substance are formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance.

In a chemical change, the properties that change are :

Q. Statement 1: Melting is a physical change as the melted wax can again be obtained as solid wax upon the removal of heat.
Statement 2: Burning of wax is a chemical change since the wax once burnt, cannot be returned back to its original form.
Which of the following statements is correct?

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