11th Class Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank 11th CBSE Chemistry Some Basic Concepts of Chemistry

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    Why Law of conservation of mass should better be called as Law of conservation of mass and energy?

    Answer:

                    In nuclear reactions, it is observed that the mass of the products is less than the mass of the reactants. The difference of mass, called the mass defect, is converted into energy according to Einstein equation, \[E=\Delta \,m{{c}^{2}}\]. Hence, we better call it as a law of conservation of mass and energy.


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