Practice Questions

Q45.Which one of the following complexes will exhibit the least paramagnetic behaviour? [Atomic number, Cr = 24, Mn = 25, Fe = 26, Co = 27 ] (1) [Cr(H2O)6]2+ (2) [Fe(H2O)6]2+ (3) [Co(H2O)6]2+ (4) [Mn(H2O)6]2+

Q45.he following complexes [CoCl(NH3)5]2+ , [Co(CN)6]3− , [Co(NH3)5 (H2O)]3+ , [Cu(H2O)4]2+ The correct (A) (B) (C) (D) order of A, B, C and D in terms of wavenumber of light absorbed is : (1) C < D < A < B (2) B < C < A < D (3) A < C < B < D (4) D < A < C < B

Q45.The molecule/ion with square pyramidal shape is: (1) Ni ( CN ) 2 - (2) PCl5 4 (3) BrF5 (4) PF5 JEE Main 2024 (30 Jan Shift 2) JEE Main Previous Year Paper

Q45. This reduction reaction is known as: (1) Rosenmund reduction (2) Wolff-Kishner reduction (3) Stephen reduction (4) Etard reduction

Q45.Which among the following halide/s will not show SN1 reaction: (1) H2C = CH - CH2Cl (2) CH3 - CH = CH - Cl (3) (4)

Q45. Consider the above chemical reaction. Product " A " is : (1) (2) (3) (4)

Q45.A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of 3.86BM. The atomic number of the metal is (1) 26 (2) 25 (3) 23 (4) 22

Q46.The correct order of reactivity in electrophilic substitution reaction of the following compounds is: (1) B > C > A > D (2) D > C > B > A (3) A > B > C > D (4) B > A > C > D

Q46.The correct statements from the following are: A. The strength of anionic ligands can be explained by crystal field theory. B. Valence bond theory does not give a quantitative interpretation of kinetic stability of coordination compounds. C. The hybridization involved in formation of [Ni ( CN ) 4] 2 – complex is dsp2. D. The number of possible isomer(s) of cis-[PtCl2 ( en ) 2] 2 + is one Choose the correct answer from the options given below: (1) A, D only (2) A, C only (3) B, D only (4) B, C only

Q46.The correct order of ligands arranged in increasing field strength. (1) F−< Br−< I−< NH3 (2) Br−< F−< H2O < NH3 (3) H2O < −OH < CN−< NH3 (4) Cl−< −OH < Br−< CN−

Q46. The major products formed : A and B respectively are: JEE Main 2024 (06 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q46.The coordination geometry around the manganese in decacarbonyldimanganese0 (1) Octahedral (2) Trigonal bipyramidal (3) Square pyramidal (4) Square planar

Q46.Identify B formed in the reaction. excess NH3 NaOH Cl - CH24 - Cl → A → B + H2O + NaCl JEE Main 2024 (27 Jan Shift 2) JEE Main Previous Year Paper (1) (2) H2 N - CH24 - NH2 (3) + (4) -ClH3N+ - CH24 - NH3Cl-

Q46.Match List I with List II List - I (Test) List - II (Observation) A. Br2 water test I. Yellow orange or orange red precipitate formed B. Ceric ammonium nitrate test II. Reddish orange colour disappears Choose C. Ferric chloride test III. Red colour appears D. 2, 4 - DNP test IV. Blue, Green, Violet or Red colour appear the correct answer from the options given below: (1) A-III, B-IV, C-I, D-II (2) A-I, B-II, C-III, D-IV (3) A-IV, B-I, C-II, D-III (4) A-II, B-III, C-IV, D-I

Q46.Yellow compound of lead chromate gets dissolved on treatment with hot NaOH solution. The product of lead formed is a : (1) Tetraanionic complex with coordination number (2) Neutral complex with coordination number four six (3) Dianionic complex with coordination number six (4) Dianionic complex with coordination number four

Q46.In alkaline medium. MnO−4 oxidises I− to (1) IO−4 (2) IO− (3) I2 (4) IO−3 JEE Main 2024 (29 Jan Shift 1) JEE Main Previous Year Paper

Q46.Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B) JEE Main 2024 (30 Jan Shift 1) JEE Main Previous Year Paper (1) (2) (3) (4)

Q46.The metal atom present in the complex MABXL (where A, B, X and L are unidentate ligands and M is metal) involves sp3 hybridization. The number of geometrical isomers exhibited by the complex is: (1) 2 (2) 0 (3) 4 (4) 3

Q46.Which of the following reaction is correct? (1) (2) (3) (4) C2H5 CONH2 + Br2 + NaOH →C2H5 CH2 NH2 + Na2 CO3 + NaBr + H2O

Q46.If an iron (III) complex with the formula [Fe(NH3)x(CN)y]− has no electron in its eg orbital, then the value of x + y is JEE Main 2024 (04 Apr Shift 2) JEE Main Previous Year Paper (1) 4 (2) 5 (3) 6 (4) 3

Q46.Which among the following compounds will undergo fastest SN2 reaction. (1) (2) (3) (4)

Q46.Identify the correct set of reagents or reaction conditions ' X ' and ' Y ' in the following set of transformation (1) X = dil.aq. NaOH, 20∘C, Y = Br2/CHCl3 (2) X = conc.alc. NaOH, 80∘C, Y = Br2/CHCl3 (3) X = dil.aq. NaOH, 20∘C, Y = HBr /acetic (4) X = conc.alc. NaOH, 80∘C, Y = HBr/ acetic acid acid

Q47. Identify the product (A) in the following reaction. (1) (2) (3) (4)

Q47.The final product A , formed in the following multistep reaction sequence is: (1) (2) (3) (4)

Q47.Which of the following compound can give positive iodoform test when treated with aqueous KOH solution followed by potassium hypoiodite. (1) (2) (3) (4) CH3CH2CH2CHO