• # question_answer 31) In a reaction, $A+{{B}_{2}}\to A{{B}_{2}}$ Identify the limiting reagent, if any, in the following reaction mixtures (i) 300 atoms of A + 200 molecules of ${{B}_{2}}$ (ii) $\text{2 mol A + 3 mol }{{\text{B}}_{\text{2}}}$ (iii) $100\,\,atoms\,of\,A+100\,molecules\,of\,{{B}_{2}}$ (iv) $5molA+2.5mol{{B}_{2}}$ (v) $2.5molA+5mol{{B}_{2}}$

(i) ${{B}_{2}}$ will be limiting reagent because it gives least amount of product on being completely consumed. (ii) A will be limiting because it gives least amount of product on complete consumption. (iii) None of the reactant is limiting because both will be completely consumed in the reaction. (iv) ${{B}_{2}}$ will be limiting. (v) A will be limiting.