Practice Questions

Q44.The vapour pressure vs. temperature curve for a solution solvent system is shown below. The boiling point of the solvent is _____°C.

Q44.The major product formed in the following reaction is A. B. JEE Main 2023 (11 Apr Shift 2) JEE Main Previous Year Paper C. D. choose the correct answer from the options Given below: (1) B only (2) A only (3) C only (4) D only

Q44.Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with cone HCl forms deep blue complex, Y which has a Z geometry. X, Y and Z, respectively, are (1) X = CoH2O6 2 + , Y = CoCl4 2 - , Z = Tetrahedral(2) X = CoH2O6 2 + , Y = CoCl6 3 - , Z = Octahedral (3) X = CoH2O6 3 + , Y = CoCl6 3 - , Z = Octahedral(4) X = CoH2O4Cl2 +, Y = CoCl4 2 - , Z = Tetrahedral

Q44.In the following reaction ‵X′ is Anhy.AlCl3 −CH3 (CH2)4 CH3 → X HCl major product △ (1) (2) (3) CH3 (CH2)4 CH2 Cl (4) Cl −CH2 −(CH2)4 −CH2 −Cl

Q44.Which of the following statements are correct? (A) The M3 + / M2 + reduction potential for iron is greater than manganese. (B) The higher oxidation states of first row d-block elements get stabilized by oxide ion (C) Aqueous solution of Cr2 + can liberate hydrogen from dilute acid (D) Magnetic moment of V2 + is observed between 4 . 4 - 5 . 2 BM JEE Main 2023 (10 Apr Shift 1) JEE Main Previous Year Paper Choose the correct answer from the options given below: (1) B, C only (2) A, B, D only (3) C, D only (4) A, B only

Q44.Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Benzene is more stable than hypothetical cyclohexatriene. Reason R : The delocalized π electron cloud is attracted more strongly by nuclei of carbon atoms. In the light of the above statements, choose the correct answer from the options given below: (1) A is true but R is false. (2) A is false but R is true. (3) Both A and R are correct and R is the correct (4) Both A and R are correct but R is NOT the explanation of A. correct explanation of A.

Q44.The number of pairs of the solution having the same value of the osmotic pressure from the following is (Assume 100% ionization) A. 0. 500 M C2H5 OH(aq) and 0. 25 M KBr(aq) B. 0. 100 M K4[Fe(CN)6](aq) and 0. 100 M FeSO4 (NH4)2 SO4(aq) C. 0. 05 M K4[Fe(CN)6] (aq) and 0. 25 M NaCl (aq) D. 0. 15 M NaCl(aq) and 0. 1 M BaCl2(aq) E. 0. 02 M KCl. MgCl2. 6H2O(aq) and 0. 05 M KCl(aq)

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

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

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

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

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. 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.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.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

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)