AIIMS 2019 Chemistry Reduction Reactions MCQ Question

Option B is correct because it accurately represents the stoichiometry of the reaction, balancing the number of atoms of each element on both sides of the equation. In contrast, the other options fail to maintain this balance or misrepresent the products formed, such as incorrectly suggesting the presence of excess reactants or incorrect molecular formulas. Understanding the principles of conservation of mass and balancing chemical equations is crucial for predicting the outcomes of reactions, as it ensures that the same number of each type of atom is present before and after the reaction occurs.