Which type of property of matter can be observed without changing the composition of the substance? question 2 options: chemical properties physical properties irreversible properties reversible properties

Before coming into conclusion first we have to know the basic  properties of matter as mentioned in the question.

During  physical reaction only the physical properties are changed .Here no new elements or compounds having a different chemical composition or configuration is formed. only the states and certain thermodynamic parametres are changed.

During the chemical reaction,the products are formed with different chemical composition and structure.The reactants and products are completely different.

Generally  all reversible reactions are physical approximately physical in nature.Here is also no change in its  composition.The state of a system can be retraced back under specific conditions.

In an irreversible reaction the initial and final products are different.The state of a thermodynamic process can be retraced back.

H options 'B' and 'D' are right where there will be  no change in  the composition of the substance.

resonant frequency