Changing subscripts is one of the steps of balancing a chemical equation

No, Changing subscripts is not the step of balancing a chemical equation

Explanation:

In balancing a chemical equation you have to keep one thing in mind that the no of atoms and elements on both sides such as reactant (before reaction) and product( after a reaction) must be equal. Coefficients are added to equal the no of atoms and elements, but we will not change the subscript.

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