AIIMS 2018 Chemistry Stoichiometry MCQ Question

Option A is correct because it accurately sums the moles of H₂ produced from both reactions: $\frac{x}{15}$ from the first reaction and $\frac{²⁻x}{30}$ from the second reaction, leading to a total of $\frac{x}{15} + \frac{²⁻x}{30} = \frac{2.24}{22.4} = \frac{1}{10}$ moles of H₂. Other options are incorrect as they either miscalculate the moles produced or do not properly represent the stoichiometry of the reactions; for instance, option B incorrectly subtracts moles instead of adding them, while option C does not account for the contributions from both reactions. Understanding stoichiometry is essential for accurately determining the quantities of products formed in chemical reactions.