MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Melting

In a physical...

Question

In a physical change, the chemical composition of the original substance is altered.

A

True

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

False

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is B False
Physical change: The change in which no new substance is formed, and the chemical composition of the original substance is not altered.
A physical change is reversible and there is no formation of a new substance.
Example: Dissolving common salt $(NaCl)$ in water is a physical change.
The dissolved common salt can be separated by the evaporation process.
Therefore the given statement is false.

Suggest Corrections

thumbs-up

1

Similar questions

Q. A change that alters the composition of a substance is known as a chemical change.

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. 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 of applying pressure or both brings about a physical change. On reversing the condition, i.e., 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, the chemical and physical properties of the substance is formed. In a chemical change, the chemical and physical properties of the substance formed will be different from the original substance. When zinc carbonate is heated and cooled, the change(s) that are observed are :

Q. Assertion :Physical change of a substance involves change in all properties and composition of its molecules Reason: The change of a substance with alteration of composition of its molecules without any change in its specific property is called physical change

Q. Sate which of the following pertains to- chemical changes.
a] substance retains its identity
b] The change is permanent
c] No new substance is formed.
d] is easily reversible
e] Produces one or more new substance in its composition.
f] The change is temporary
g] The composition and properties of the original substance are not altered.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

So Many Ways to Change

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard VIII Chemistry

Join BYJU'S Learning Program

CrossIcon