State Four Differences Between Physical and Chemical Changes.

State four differences between physical and chemical changes.

फरक स्पष्ट करा

Physical change	Chemical change
No new substances with new properties are formed. It can be reversed by simple physical methods. It is temporary change. Energy is neither needed nor produced.	New substances with new properties are formed. Change cannot be reversed by simple physical methods. It is permanent change. Energy is either needed or evolved.

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पाठ 2: Physical and Chemical Changes - Exercise

पाठ 2 Physical and Chemical Changes
Exercise | Q 7

Make a list of different types of changes with example.

A burning candle shows both physical and chemical changes. Explain ?

Write true or false

A natural change can also be a desirable change.

Classify the following changes as physical or chemical.

The rusting of an iron object is called :

Classify the following as a physical or a chemical change.

Manufacture of salt from sea water

Compare the energy changes involved during a physical and a chemical change.

Name the following.

The gaseous product of the chemical change which takes place during respiration in living organisms.

When ice melts to form water, change occurs in its

Fill in the blanks in the following statements using the words given in the box.

Making sugar solution is a ______ change.
A physical change is generally ______.
Grinding of wheat grain changes its size. It is a ______ change.
Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.