Tiêu đề 01. SOME BASIC CONCEPTS OF CHEMISTRY - 1.pdf ✅

1 JEE ADVANCED 2024 Mole Concept 1. For the reaction 7A + 13 B + 15C → 17P If 15 moles of A , 26 mole of B and 30.5 moles of C are taken initially, then limiting reactant is : (1) A (2) B (3) C (4) none of these 2. For the reaction: 2X + 3Y  3Z, the combination of 2.00 moles of X with 2.00 moles of Y produces 1.75 moles of Z. What is the percent yield of this reaction? (1) 43.8% (2) 58.3% (3) 66.7% (4) 87.5% 3. Fe2O3 reacts with excess CO at a high temperature according to the equation below: Fe2O3 + 3CO  2Fe + 3CO2 If 6.50 g of Fe2O3 yields 3.85 g of Fe, what is the percentage yield of the reaction? (1) 59.2% (2) 69.9% (3) 76.3% (4) 84.7% 4. NX is produced by the following step of reactions: M + X2  MX2 3MX2 + X2  M3X8 M3X8 + N2CO3  NX + CO2 + M3O4 How much M (metal) is consumed to produce 206 gm of NX? (Take at. Wt. of M = 56, N = 23, X = 80) (1) 42 gm (2) 56 gm (3) 14/3 gm (4) 7/4 gm 5. 5 moles of A, 6 moles of Z are mixed with sufficient amount of C to finally produce F. Then find the maximum moles of F which can be produced. Assuming that the product formed can also be reused. Reactions are: A + 2Z  B .....(i) B + C  Z + F ....(ii) (1) 3 moles (2) 4.5 moles (3) 5 moles (4) 6 moles 6. For sequential reaction: A  B + C .....(i) 2B  C + 2D ....(ii) If % yield of (i) and (ii) reactions are 90% and 80% respectively, then the overall % yield is expected to be: (1) 90% (2) 80% (3) 72% (4) 10% 7. In the following set of reactions, CaCO CaO CO (75% yield ) 3 2   CO C 2CO(50% yield ) 2     CO formed at STP from 10 g of CaCO3 is (1) 2.24 L (2) 11.2 L (3) 1.12 L (4) 1.68 L 8. 12 moles of each A & B are allowed to react as given: 1 3A 2B C D 2    . If 60 g of D is produced then calculate the atomic mass of D. (1) 30 (2) 45 (3) 60 (4) 15 9. If 0.5 mol of BaCl2 is mixed with 0.1 mole of Na3PO4, the maximum number of mole of Ba3(PO4)2 that can be formed is: (1) 0.7 (2) 0.05 (3) 0.30 (4) 0.10 10. Sulphur trioxide is prepared by the following two reactions: S8(s) + 8O2(g)  8SO2(g) 2SO2(g) + O2(g)  2SO3(g) How many grams of SO3 are produced from 1 mol of S8? (1) 1280.0 (2) 640.0 (3) 960.0 (4) 320.0 DPP - 1