Practice Questions

Q44.The complex with highest magnitude of crystal field splitting energy (Δ0) is (1) [Ti(OH2)6]3+ (2) [Cr (OH2)6]3+ (3) [Mn (OH2)6]3+ (4) [Fe (OH2)6]3+

Q45.Which of the following compounds would give the following set of qualitative analysis? (i) Fehling’s Test: Positive (ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue. (1) (2) (3) (4)

Q45. Pt (s)H2( g)(1 bar)|H+(aq)(1M)| M3+(aq), M+(aq) Pt(s) The Ecell for the given cell is 0. 1115 V at 298 K [M+(aq)] When = 10a [M3+(aq)] The value of a is ___________ Given : Eθ M3+/M+= 0. 2 V 2.303 RT = 0. 059 V F

Q45.Number of crystal systems from the following where body centred unit cell can be found, is _____. Cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, triclinic

Q45.The reaction occurs in which of the given galvanic cell? 1 2 H2( g) + AgCl(s) ⇌H+(aq) + Cl−(aq) + Ag(s) (1) Pt |H2(g)| HCl(soln )| AgCl(s)| Ag (2) Ag | AgCl(s)| KCl(soln )| AgNO3 | Ag (3) Pt |H2(g)| HCl(soln )| AgNO3(soln )| Ag (4) Pt |H2(g)| KCl(soln )| AgCl(s)| Ag

Q45.Assertion A: Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of hydrolysis increases. Reason R: I- is a good nucleophile as well as a good leaving group. In the light of the above statements, choose the correct answer from the options given below. (1) A is false but R is true (2) A is true but R is false (3) Both A and R are true and R is the correct (4) Both A and R are true and R is not the correct explanation of A explanation of A

Q45.A metal M crystallizes into two lattices :- face centred cubic (fcc) and body centred cubic (bcc) with unit cell edge length of 2. 0 and 2. 5 °A respectively. The ratio of densities of lattices fcc to bec for the metal M is _______(Nearest integer) Q46. 20% of acetic acid is dissociated when its 5 g is added to 500 mL of water. The depression in freezing point of such water is _____ × 10−3∘C. Atomic mass of C, H and O are 12, 1 and 16 a.m.u. respectively. [Given : Molal depression constant and density of water are 1. 86 K kg mol−1 and 1 g cm−3 respectively. Q47. 1 × 10−5 M AgNO3 is added to 1 L of saturated solution of AgBr. The conductivity of this solution at 298 K is _______ × 10−8 S m−1 . [Given : Ksp(AgBr) = 4. 9 × 10−13 at 298 K λ0 = 6 × 10−3 Sm2 mol−1 Ag+ JEE Main 2023 (01 Feb Shift 2) JEE Main Previous Year Paper λ0Br−= 8 × 10−3 Sm2 mol−1 λ0 = 7 × 10−3 Sm2 mol−1] NO−3

Q45.The correct IUPAC nomenclature for the following compound is: (1) 2 -Methyl- 5 -oxohexanoic acid (2) 2 -Formyl- 5 -methylhexan- 6 -oic acid (3) 5 -Methyl- 2 -oxohexan- 6 -oic acid (4) 5 -Formyl- 2 -methylhexanoic acid

Q45.Correct statement about smog is (1) NO2 is present in classical smog (2) Both NO2 and SO2 are present in classical smog (3) Photochemical smog has high concentration of (4) Classical smog also has high concentration of oxidizing agents oxidizing agents

Q45.Iron oxide FeO, crystallises in a cubic lattice with a unit cell edge length of 5. 0Å . If density of the FeO in the crystal is 4. 0 g cm−3 , then the number of FeO units present per unit cell is _____ (Nearest integer) Given : Molar mass of Fe and O is 56 and 16 g mol−1 respectively. NA = 6. 0 × 1023 mol−1

Q45.Identify the incorrect option from the following: JEE Main 2023 (01 Feb Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q45.The correct order of melting point of dichlorobenzenes is (1) (2) (3) (4)

Q45.The major product formed in the Friedel-Craft acylation of chlorobenzene is (1) (2) (3) (4) Q46. ‘ A’ formed in the above reaction is (1) (2) (3) (4)

Q45.Which of the following complexes will exhibit maximum attraction to an applied magnetic field? (1) [Ni ( H2O ) 6] 2 + (2) [Co ( en ) 3] 3 + (3) [Zn ( H2O ) 6] 2 + (4) [Co ( H2O ) 6] 2 +

Q45.The Total pressure observed by mixing two liquid A and B is 350 mm Hg when their mole fractions are 0. 7 and 0. 3 respectively. The Total pressure becomes 410 mm Hg if the mole fractions are changed to 0. 2 and 0. 8 respectively for A and B . The vapour pressure of pure A is ______ mm Hg . (Nearest integer) Consider the liquids and solutions behave ideally

Q45.For the reaction Acetone RCH2Br + I- ⟶ RCH2I + Br- major The correct statement is (1) Br– can act as competing nucleophile. (2) The reaction can occur in acetic acid also. (3) The transition state formed in the above reaction (4) The solvent used in the reaction solvates the ions is less polar than the localised anion. formed in rate determining step

Q45.The equilibrium constant for the reaction Zn(s) + Sn2+(aq) ⇌Zn2+(aq) + Sn(s) is 1 × 1020 at 298 K . The magnitude of standard electrode potential of Sn / Sn2+ if E0 = −0. 76 V is _____ ×10−2 V . (Nearest Zn2* / Zn integer) Given : 2.303 RT = 0. 059 V F

Q45.The octahedral diamagnetic low spin complex among the following is (1) CoNH36 3 + (2) CoF6 3 - (3) CoCl6 3 - (4) NiCl4 2

Q46.The major product ‘P’ formed in the given reaction is JEE Main 2023 (10 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q46.Lead storage battery contains 38% by weight solution of H2 SO4 . The van't Hoff factor is 2. 67 at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is _____ (Nearest integer). Given Kf = 1. 8 K kg mol−1

Q46.Benzyl isocyanide can be obtained by: (A) (B) (C) (D) Choose the correct answer from the options given below: JEE Main 2023 (30 Jan Shift 1) JEE Main Previous Year Paper (1) A and D (2) Only B (3) A and B (4) B and C

Q46.Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is/ are _____ A. 1 M aq. NaCl and 2 M aq. urea B. 1 M aq. CaCl2 and 1. 5 M aq. KCl C. 1. 5 M aq. AlCl3 and 2 M aq. Na2 SO4 D. 2. 5 M aq. KCl and 1 M aq. Al2(SO4)3 JEE Main 2023 (06 Apr Shift 2) JEE Main Previous Year Paper

Q46.The major products A and B from the following reactions are : (1) (2) (3) (4)

Q46.Solution of 12 g of non-electrolyte (A) prepared by dissolving it in 1000 mL of water exerts the same osmotic pressure as that of 0. 05 M glucose solution at the same temperature. The empirical formula of A is CH2 O. The molecular mass of A is ________g. (Nearest integer)

Q46.An organic compound ' 𝐴 ' with empirical formula C6H6O gives sooty flame on burning. Its reaction with bromine solution in low polarity solvent results in high yield of 𝐵 . 𝐵 is (1) (2) (3) (4)