any two ways to bring about a change in a substance
Answers
1. add an acid or Base or salt
2.Any reaction to its composition
Physical change:
1. heating or melting
2.shape by stretching.
Any two ways to bring about a change in a substance are given below:
1. Change due to temperature
We can bring about a change in substance by increasing the temperature. For instance: by raising temperature, we can change a solid form to liquid form.
When we heat water in high temperature, it changes into vapour form. Thus, we can say that a change has been brought in water due to which its form has changed into gaseous form.
2. Change due to chemical mixing
A change can also be brought by mixing two or more chemicals together. For example: by mixing sodium chemical with chloride, there occurs change in composition which results in the formation of Sodium chloride salt.
When we mix 2 molecules of hydrogen with 1 molecule of oxygen, it results in the formation of water molecule.
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