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The rate at which hydrogen is used in the reaction. N2(g) + 3H2(g) → 2NH3(g) is 1.72 mol H2.L^-1.h^-1. What is the rate (in mol N2.L^-1.h^-1) at which nitrogen is used?

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The rate at which hydrogen is used in the reaction. N2(g) + 3H2(g) → 2NH3(g) is 1.72 mol H2.L^-1.h^-1. What is the rate (in mol N2.L^-1.h^-1) at which nitrogen is used? Answer: 0.57

The rate of disappearance of reactants in a chemical reaction is proportional to their stoichiometric coefficients. Since 3 mol H₂ react with 1 mol N₂, nitrogen is consumed at one-third the rate of hydrogen.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.