Practice Questions

Q43.The number of element from the following that do not belong to lanthanoids is Eu, Cm, Er, Tb, Yb and Lu (1) 3 (2) 4 (3) 1 (4) 5

Q43. List - I List - II A. K2 [Ni(CN)4] I. sp3 Match List I with List II B. [Ni(CO)4] II. sp3 d2 Choose the correct answer from the C. [Co(NH3)6]Cl3 III. dsp2 D. Na3 [CoF6] IV. d2sp3 options given below: (1) A-III, B-I, C-IV, D-II (2) A-III, B-I, C-II, D-IV (3) A-I, B-III, C-II, D-IV (4) A-III, B-II, C-IV, D-I

Q43.Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spaceship B. has as efficiency of 40% to produce electricity C. uses aluminum as catalysts D. is eco-friendry E. is actually a type of Galvanic cell only Choose the correct answer from the options given below: (1) A, B, D, E only (2) A, D, E only (3) A, B, D only (4) A, B, C only

Q43.Identify the incorrect statements about group 15 elements : (A) Dinitrogen is a diatomic gas which acts like an inert gas at room temperature. (B) The common oxidation states of these elements are −3, +3 and +5 . (C) Nitrogen has unique ability to form pπ −pπ multiple bonds. (D) The stability of +5 oxidation states increases down the group. (E) Nitrogen shows a maximum covalency of 6. Choose the correct answer from the options given below : JEE Main 2024 (08 Apr Shift 2) JEE Main Previous Year Paper (1) (A), (C), (E) only (2) (B), (D), (E) only (3) (D) and (E) only (4) (A), (B), (D) only

Q43.Alkyl halide is converted into alkyl isocyanide by reaction with (1) NaCN (2) NH4 CN (3) KCN (4) AgCN JEE Main 2024 (29 Jan Shift 2) JEE Main Previous Year Paper

Q43.The number of ions from the following that have the ability to liberate hydrogen from a dilute acid is _____. Ti2+, Cr2+ and V2+ (1) 2 (2) 3 (3) 1 (4) 0

Q43.We have three aqueous solutions of NaCl labelled as ‘A’, ‘B’ and ‘C’ with concentration 0 . 1 M, 0 . 01M and 0 . 001 M, respectively. The value of van t’ Haft factor i for these solutions will be in the order. (1) iA < iB < iC (2) iA < iC < iB (3) iA = iB = iC (4) iA > iB > iC

Q43.The element which shows only one oxidation state other than its elemental form is : (1) Cobalt (2) Titanium (3) Nickel (4) Scandium

Q43.The final product A formed in the following multistep reaction sequence is (1) (2) (3) (4)

Q43.Identity the incorrect pair from the following: (1) Photography - AgBr (2) Polythene preparation - TiCl4, AlCH33 (3) Haber process - Iron (4) Wacker process - PtCl2

Q43.Integrated rate law equation for a first order gas phase reaction is given by (where 𝑃𝑖 is initial pressure and 𝑃𝑡 is total pressure at time 𝑡) 2 . 303 𝑃𝑖 2 . 303 2𝑃𝑖 (1) 𝑘= × log (2) 𝑘= × log 𝑡 2𝑃𝑖- 𝑃𝑡 𝑡 2𝑃𝑖- 𝑃𝑡 2 . 303 2𝑃𝑖- 𝑃𝑡 2 . 303 𝑃𝑖 (3) 𝑘= × log (4) 𝑘= × 𝑡 𝑃𝑖 𝑡 2𝑃𝑖- 𝑃𝑡

Q44. List - I List - II (Compound) (Uses) A. Iodoform I. Fire extinguisher Match List I with List II Choose the correct B. Carbon tetrachloride II. Insecticide C. CFC III. Antiseptic D. DDT IV. Refrigerants answer from the options given below: (1) A-I, B-II, C-III, D-IV (2) A-III, B-I, C-IV, D-II (3) A-II, B-IV, C-I, D-III (4) A-III, B-II, C-IV, D-I

Q44.Alkaline oxidative fusion of MnO2 gives "A " which on electrolytic oxidation in alkaline solution produces 𝐵. 𝐴 and 𝐵 respectively are: (1) Mn2O7 and MnO4- (2) MnO42 - and MnO4- (3) Mn2O3 and MnO42 - (4) MnO42 - and Mn2O7

Q44.Consider the given reaction, identify the major product P . CH3 −COOH (i) LiAlH4 (ii) PCC (iii) HCN/OH→ "P" – (iv) H2O/OH,Δ JEE Main 2024 (06 Apr Shift 2) JEE Main Previous Year Paper (1) (2) CH3 −CH2 −CH2 −OH (3) (4)

Q44.The metal that shows highest and maximum number of oxidation state is : (1) Fe (2) Mn (3) Co (4) Ti

Q44.Select the option with correct property: (1) 𝑁𝑖𝐶𝑂4 and 𝑁𝑖𝐶𝑙4 2 − both diamagnetic (2) 𝑁𝑖𝐶𝑂4 and 𝑁𝑖𝐶𝑙4 2 − both paramagnetic (3) 𝑁𝑖𝐶𝑙4 2 − diamagnetic, 𝑁𝑖𝐶𝑂4 paramagnetic (4) 𝑁𝑖𝐶𝑂4 diamagnetic, 𝑁𝑖𝐶𝑙4 2 − paramagnetic

Q44.The transition metal having highest 3rd ionisation enthalpy is: (1) Cr (2) Mn (3) V (4) Fe

Q44. NaCl reacts with conc. H2 SO4 and K2 Cr2 O7 to give reddish fumes (B), which react with NaOH to give yellow solution (C). (B) and (C) respectively are ; (1) CrO2 Cl2, Na2 CrO4 (2) Na2 CrO4, CrO2 Cl2 (3) CrO2 Cl2, KHSO4 (4) CrO2 Cl2, Na2 Cr2 O7

Q44.Aluminium chloride in acidified aqueous solution forms an ion having geometry (1) Octahedral (2) Square Planar (3) Tetrahedral (4) Trigonal bipyramidal

Q44.Number of Complexes with even number of electrons in t2g orbitals is - [Fe(H2O)6]2+, [Co(H2O)6]2+, [Co(H2O)6]3+, [Cu(H2O)6]2+, [Cr(H2O)6]2+ (1) 2 (2) 3 (3) 1 (4) 5

Q44.The coordination environment of Ca2+ ion in its complex with EDTA4− is : (1) tetrahedral (2) trigonal prismatic (3) octahedral (4) square planar

Q44.When MnO2 and H2SO4 is added to a salt (A), the greenish yellow gas liberated as salt (A) is : (1) CaI2 (2) NaBr (3) KNO3 (4) NH4Cl

Q44.lectronic configuration of Cu(II) is 3 d9 whereas that of Cu(I) is 3 d10 . Which of the following is correct? (1) Stability of Cu(I) and Cu(II) depends on nature (2) Cu(II) is more stable of copper salts (3) Cu(I) and Cu(II) are equally stable (4) Cu (II) is less stable

Q44.Phenol treated with chloroform in presence of sodium hydroxide, which further hydrolysed in presence of an acid results (1) Salicyclic acid (2) Benzene-1,2-diol (3) Benzene-1, 3-diol (4) 2-Hydroxybenzaldehyde

Q44.Identify the incorrect pair from the following : (1) Fluorspar- BF3 (2) Cryolite- Na3 AlF6 (3) Fluoroapatite- 3 Ca3 (PO4)2 ⋅CaF2 (4) Carnallite- KCl ⋅MgCl2 ⋅6H2O