English

Define physical change. Give two examples for the above changes. - Chemistry

Advertisements
Advertisements

Question

Define physical change. Give two examples for the above changes.

Definition
Advertisements

Solution

Physical change: A temporary change in which no new substance is formed, the composition of substance remains the same, though its state, shape and size may change.

Example of physical change:

  1. Change of water into its vapours.
  2. Heating of iron rod.
shaalaa.com
  Is there an error in this question or solution?
Chapter 2: Physical and Chemical Changes - Exercise [Page 18]

APPEARS IN

Selina Concise Chemistry [English] Class 8 ICSE
Chapter 2 Physical and Chemical Changes
Exercise | Q 1.1 | Page 18
Selina Concise Chemistry [English] Class 7 ICSE
Chapter 2 Physical and Chemical Changes
Exercise | Q 1.1

RELATED QUESTIONS

Explain the following giving an example.

Pure substance


Classify the changes involved in the following process as physical or chemical changes:

Photosynthesis


Write true or false for the statement

A natural change can also be a desirable change


Solve this crossword by using the clues that follow.

Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1. It is the change that takes place in case of swinging pendulum of a clock.
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change


State whether the following is physical or chemical changes.

burning of sugar — 


State whether the following is physical or chemical changes.

shaping a piece of glass —


State whether the following is physical or chemical changes.

photosynthesis — 


Write true or false 

Burning of sugar is a temporary change.


Name two reversible changes.


Give two examples of periodic changes.


The rusting of an iron object is called :


Define a chemical change. Give two examples of the above changes.


Differentiate between a physical change and a chemical change with reference to – Formation of products.


Fill in the blank with the appropriate word of the statement  given below:

If a change is permanent and irreversible it is considered a _________ change.


Fill in the blank with the correct word of the statement given below:

Sublimation involves a __________ change.


Select the chemical changes from the following list of changes

Respiration in mammals.


Give the reason why the following is considered as chemical changes.

An iron nail kept open in the atmosphere rusts.


Name the following.

The product obtained during a physical change when water converts from a liquid into a solid.


What is the difference between dissolution of sugar and burning of sugar ?


Natural changes which take place in nature on their own, are beyond the control of human being.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×