AIIMS 2019 Chemistry Reaction Mechanisms MCQ Question

Option A is correct because it accurately represents the stoichiometry of the chemical reaction, ensuring that the number of atoms for each element is conserved on both sides of the equation. For example, if the reaction involves the formation of water (H₂O) and carbon dioxide (CO₂), it must balance the hydrogen and oxygen atoms accordingly. The other options are incorrect as they either misrepresent the reactants or products, fail to maintain the law of conservation of mass, or do not reflect the correct coefficients needed for balancing the equation. Understanding the principles of balancing chemical reactions is crucial for accurately predicting the outcomes of chemical processes.