Practice Questions
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Q57.The 'spin only' magnetic moment value of MO42− is _______ BM. (Where M is a metal having least metallic radii. among Sc, Ti, V, Cr, Mn and Zn ). (Given atomic number: Sc = 21, Ti = 22, V = 23, Cr = 24, Mn = 25 and Zn = 30)
Q57.The 'Spin only’ Magnetic moment for [Ni ( NH3 ) 6] 2 + is______ × 10 – 1 BM. (given = Atomic number of Ni : 28) Round off your answer to the nearest integer.
Q57.Total number of compounds with Chiral carbon atoms from following is CH3 - CH2 - CHNO2 - COOH CH3 - CH ( I ) - CH2 - NO2 CH3 - CH2 - CHBr - CH2 - CH3 CH3 - CH2 - CH ( OH ) - CH2OH JEE Main 2024 (27 Jan Shift 2) JEE Main Previous Year Paper
Q57.Given below are two statements : Statement I: The rate law for the reaction A + B →C is rate (r) = k[A]2[B] . When the concentration of both A and B is doubled, the reaction rate is increased " x " times. Statement II : JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper The figure is showing "the variation in concentration against time plot" for a " y " order reaction. The Value of x + y is ______
Q57.The spin-only magnetic moment value of the ion among Ti2+, V2+, Co3+ and Cr2+ , that acts as strong oxidising agent in aqueous solution is _______ BM (Near integer). (Given atomic numbers : Ti : 22, V : 23, Cr : 24, Co : 27)
Q57.Number of moles of H+ ions required by 1 mole of MnO4− to oxidise oxalate ion to CO2 is ______.
Q57.A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of formula M2On (where n = 3, 4, 5). The 'spin-only' magnetic moment value of the amphoteric oxide from the above oxides is ______ BM (near integer) (Given atomic number: Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26, Co : 27, Ni : 28, Cu : 29, Zn : 30)
Q57.Number of complexes which show optical isomerism among the following is _________. 3 - 3 + 2 + + ) cis - Cr ( ox ) 2Cl2 , Co ( en 3 , cis - Pt ( en ) 2Cl2 , cis - Co ( en ) 2Cl2 2 + 3 - , trans - Pt ( en , trans - Cr ( ox ) 2Cl2 ) 2Cl2 Q58.2 - chlorobutane + Cl2 →C4H8Cl2 (isomers) Total number of optically active isomers shown by C4H8Cl2, obtained in the above reaction is ________. JEE Main 2024 (30 Jan Shift 2) JEE Main Previous Year Paper
Q57.On a thin layer chromatographic plate, an organic compound moved by 3. 5 cm, while the solvent moved by 5 cm . The retardation factor of the organic compound is _____________ ×10−1
Q58.Number of colourless lanthanoid ions among the following is ________ Eu3+, Lu3+, Nd3+, La3+, Sm3+
Q58.The ratio of 14C in a piece of wood is 1 part that of atmosphere. If half life of 14C is 5730 years, the age of 12C 8 wood sample is ..... years.
Q58.Consider the following reaction MnO2 + KOH + O2 →A + H2O. Product ' A ' in neutral or acidic medium disproportionate to give products ' B ' and ' C ' along with water. The sum of spin-only magnetic moment values of B and C is BM. (nearest integer) (Given atomic number of Mn is 25) JEE Main 2024 (04 Apr Shift 1) JEE Main Previous Year Paper
Q58.The mass of silver (Molar mass of Ag : 108 gmol−1 ) displaced by a quantity of electricity which displaces 5600 mL of O2 at S.T.P. will be _____ g.
Q58.Total number of unpaired electrons in the complex ions [Co(NH3)6]3+ and [NiCl4]2− is
Q58.In the Claisen-Schmidt reaction to prepare 351 g of dibenzalacetone using 87 g of acetone, the amount of benzaldehyde required is ______ g. (Nearest integer)
Q58.The hydrogen electrode is dipped in a solution of pH = 3 at 25°C. The potential of the electrode will be - 2 . 303RT ______ × 10-2 V. = 0 . 059 V Round off the answer to the nearest integer. F
Q58.The difference in the 'spin-only' magnetic moment values of KMnO4 and the manganese product formed during titration of KMnO4 against oxalic acid in acidic medium is _______ BM. (nearest integer)
Q58.When ' x ' ×10−2 mL methanol (molar mass = 32 g; density = 0.792 g/cm3 ) is added to 100 mL water (density = 1 g/cm3 ), the following diagram is obtained. x = ______ (nearest integer). [Given : Molal freezing point depression constant of water at 273.15 K is 1.86 K kg mol−1 ]
Q58.The mass of sodium acetate (CH3 COONa) required to prepare 250 mL of 0. 35M aqueous solution is _____ g. ( Molar mass of CH3 COONa is 82. 02 g mol−1 ) Round off to the nearest integer.
Q58.A constant current was passed through a solution of AuCl−4 ion between gold electrodes. After a period of 10. 0 minutes, the increase in mass of cathode was 1. 314 g. The total charge passed through the solution is ___ ×10−2 F. (Given atomic mass of Au = 197)
Q58.The mass of zinc produced by the electrolysis of zinc sulphate solution with a steady current of 0. 015 A for 15 minutes is _ ___ × 10−4 g. (Atomic mass of zinc = 65. 4 amu)
Q59.The product (C) in the following sequence of reactions has ______ π bonds.
Q59.Two moles of benzaldehyde and one mole of acetone under alkaline conditions using aqueous NaOH after heating gives x as the major product. The number of π bonds in the product x is _______
Q59.Total number of species from the following with central atom utilising sp2 hybrid orbitals for bonding is _____. NH3, SO2, SiO2, BeCl2, C2H2, C2H4, BCl3, HCHO, C6H6, BF3, C2H4Cl2
Q59.Among the following oxide of p - block elements, Cl2O7, CO, PbO2, N2O, NO, Al2O3, SiO2, N2O5, SnO2