Question

8. In a reaction x + y + z2 → xyz2 identify the Limiting reagent if any,
in the following reaction mixtures.
(a) 200 atoms of x + 200 atoms of y + 50 molecules of z2
(b) 1mol of x + 1 mol of y+3 mol of z2
(c) 50 atoms of x + 25 atoms of y+50 molecules of z2
(d) 2.5 mol of x +5 mol of y+5 mol of z2

Answer 1

Answer :- (i) 200 molecules of B will react with 200 atoms of Aand 100 atoms of A will remain unreacted. Hence, B2​ is the limiting reagent.

(ii) 2 moles of A will react with 2 moles of B2​ and 1mole of B2​ will remain unreacted. Thus, A is the limiting reagent.

(iii) 100 atoms of A will react with 100 molecules of B2​. Thus, both reagents are present in stoichiometric amounts.

(iv) 2.5 mole of B2​ will react with 2.5 mole of A and 2.5 mole of A will remain unreacted. Hence, B2​ is the limiting reagent.

(v) 2.5 moles of A will react with 2.5 moles of B2​and 2.5 moles of B2​ will remain unreacted. Thus, B2​is the limiting reagent.