Chemistry - Redox Reactions Question with Solution | TestHub

I is correct: equivalents of reactants (and products) are always equal in a reaction - that is the basis of the gram-equivalent method. II is also correct: it is the law of conservation of mass. But mass conservation is not the reason equivalents are equal - the equality of equivalents follows from the definition of equivalent weight through the n-factor, so II does not explain I. Hence (b).