Practice Questions

Q57.In the presence of sunlight, benzene reacts with Cl2 to give product, X . The number of hydrogens in X is

Q57.PCl5 + H2O →A + HCl A + H2O →B + HCl Find number of ionisable hydrogen in B

Q57.The osmotic pressure exerted by a solution prepared by dissolving 2. 0 g of protein of molar mass 60 kg mol−1 in 200 mL of water at 27 °C is____ Pa . [integer value] (use R = 0. 083 L bar mol−1 K−1 )

Q57.A solution containing 2. 5 × 10−3 kg of a solute dissolved in 75 × 10−3 kg of water boils at 373. 535 K. The molar mass of the solute is mol−1⋅ [nearest integer] (Given : Kb(H2O) = 0. 52 K kg mol−1 and boiling point of water = 373. 15 K)

Q58.Among Co3 + , Ti2 + , V2 + and Cr2 + ions, one if used as a reagent cannot liberate H2 from dilute mineral acid solution, its spin-only magnetic moment in gaseous state is _____ B.M. (Nearest integer) JEE Main 2022 (25 Jul Shift 1) JEE Main Previous Year Paper

Q58.(a) CoCl3. 4 NH3 , (b) CoCl3 ⋅5 NH3 , (c) CoCl3 ⋅6 NH3 and (d) CoCl (NO3)2 ⋅5 NH3 Number of complex(es) which will exist in cis-trans form is/are

Q58.The number of inter halogens from the following having square pyramidal structure is ClF3, IF7, BrF5, BrF3, I2Cl6, IF5, ClF, ClF5 JEE Main 2022 (28 Jul Shift 1) JEE Main Previous Year Paper

Q58.The amount of charge in F (Faraday) required to obtain one mole of iron from Fe3 O4 is ______. (Round off the answer to the nearest integer)

Q58.For the decomposition of azomethane. CH3 N2 CH3(g) →CH3 CH3(g) + N2 a first order reaction, the variation in partial pressure with time at 600 K is given as The half life of the reaction is____ ×10−5 s

Q58.Amongst FeCl3 . 3H2O, K3FeCN6 and CoNH36Cl3, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is B.M. [nearest integer]

Q58.In the titration of KMnO4 and oxalic acid in acidic medium, the change in oxidation number of carbon at the end point is

Q58.The number of terminal oxygen atoms present in the product B obtained from the following reaction is FeCr2 O4 + Na2 CO3 + O2 →A + Fe2 O3 + CO2 A + H+ →B + H2O + Na+

Q58.The quantity of electricity in Faraday needed to reduce 1 mol of Cr2 O2−7 to Cr3+ is

Q58.Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores of iron is JEE Main 2022 (27 Jul Shift 2) JEE Main Previous Year Paper

Q58.The reaction between X and Y is first order with respect to X and zero order with respect to Y . [X] [Y] Initial rate Experiment molL−1 molL−1 molL−1min−1 JEE Main 2022 (29 Jul Shift 1) JEE Main Previous Year Paper I 0. 1 0. 1 2 × 10−3 II L 0. 2 4 × 10−3 III 0. 4 0. 4 M × 10−3 IV 0. 1 0. 2 2 × 10−3 Examine the data of table and calculate ratio of numerical values of M and L. Q59. [Fe (CN)6]3− should be an inner orbital complex. Ignoring the pairing energy, the value of crystal field stabilization energy for this complex is (−)_____ Δ0 .

Q58.In a cell, the following reactions take place Fe2 + →Fe3 + + e- Eo + + = 0 . 77 V Fe3 / Fe2 2I- →I2 + 2e- EI20 / I- = 0 . 54 V The standard electrode potential for the spontaneous reaction in the cell is x × 10-2 V at 298 K. The value of x is - (Nearest Integer)

Q58.The rate constant for a first order reaction is given by the following equation : lnk = 33. 24 −2.0×104T K The Activation energy for the reaction is given by kJmol−1 . (In Nearest integer) (Given : R = 8. 3 J K−1 mol−1 )

Q58.The spin-only magnetic moment value of the most basic oxide of vanadium among V2O3 ' V2O4 and V2O5 is____B.M. (Nearest integer)

Q58.The rate constants for decomposition of acetaldehyde have been measured over the temperature range 700 −1000 K . The data has been analysed by plotting lnk vs 103T graph. The value of activation energy for the reaction is kJmol−1 . (Nearest integer) (Given : R = 8. 31 JK−1 mol−1 )

Q58.A gaseous mixture of two substances A and B, under a total pressure of 0. 8 atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is 0. 5 in the vapour phase and 0. 2 in the liquid phase. The vapour pressure of pure liquid A is____atm.(Nearest integer)

Q58.(a) Baryte, (b) Galena, (c) Zinc blende and (d) Copper pyrites. How many of these minerals are sulphide based?

Q58.Spin only magnetic moment of [MnBr6]4− is _____ B.M. (round off to the closest integer)

Q58.Sum of oxidation state (magnitude) and coordination number of cobalt in NaCobpyCl4 is

Q58.Total number of isomers (including stereoisomers) obtain on monochlorination of methylcyclohexane is

Q58. Cu(s) + Sn2+(0. 001M) →Cu2+(0. 01M) + Sn(s) The Gibbs free energy change for the above reaction at 298 K is x × 10−1 kJ mol−1 . The value of x is____[nearest integer] [Given : E⊖ = 0. 34 V; E⊖ = −0. 14 V; F = 96500 Cmol−1 ] Cu2+ / Cu Sn2+ / Sn