Practice Questions

Q42.In the given compound, the number of 2∘ carbon atom /s is _______. (1) Four (2) Two (3) One (4) Three JEE Main 2024 (08 Apr Shift 1) JEE Main Previous Year Paper

Q42.The reaction at cathode in the cells commonly used in clocks involves. (1) reduction of Mn from +7 to +2 (2) reduction of Mn from +4 to +3 (3) oxidation of Mn from +3 to +4 (4) oxidation of Mn from +2 to +7

Q42.A solution of two miscible liquids showing negative deviation from Raoult's law will have : (1) increased vapour pressure, increased boiling (2) increased vapour pressure, decreased boiling point point (3) decreased vapour pressure, decreased boiling (4) decreased vapour pressure, increased boiling point point

Q42.A conductivity cell with two electrodes (dark side) are half filled with infinitely dilute aqueous solution of a weak electrolyte. If volume is doubled by adding more water at constant temperature, the molar conductivity of the cell will - (1) decrease sharply (2) increase sharply (3) remain same or can not be measured accurately (4) depend upon type of electrolyte JEE Main 2024 (06 Apr Shift 1) JEE Main Previous Year Paper

Q42.The correct IUPAC name of K2 MnO4 is: (1) Potassium tetraoxopermanganate (VI) (2) Potassium tetraoxidomanganate (VI) (3) Dipotassium tetraoxidomanganate (VII) (4) Potassium tetraoxidomanganese (VI)

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

Q43.Element not showing variable oxidation state is : (1) Bromine (2) Iodine (3) Chlorine (4) Fluorine

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.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 strongest reducing agent amont the following is: JEE Main 2024 (01 Feb Shift 2) JEE Main Previous Year Paper (1) NH3 (2) SbH3 (3) BiH3 (4) PH3

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.Molar ionic conductivities of divalent cation and anion are 57 S cm2 mol−1 and 73 S cm2 mol−1 respectively. The molar conductivity of solution of an electrolyte with the above cation and anion will be : (1) 187 S cm2 mol−1 (2) 260 S cm2 mol−1 (3) 130 S cm2 mol−1 (4) 65 S cm2 mol−1

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

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

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

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

Q44.Which of the following complex is homoleptic? (1) Ni ( CN ) 2 - (2) NiNH32Cl2 4 (3) FeNH34Cl2 + (4) CoNH34Cl2 +

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

Q45.The correct sequence of ligands in the order of decreasing field strength is : (1) NCS−> EDTA4−> CN−> CO (2) CO > H2O > F−> S2− (3) S2−> −OH > EDTA4−> CO (4) −OH > F−> NH3 > CN−

Q45.Given below are two statements : Statement (I) : The 4f and 5f - series of elements are placed separately in the Periodic table to preserve the principle of classification. Statement (II) : s-block elements can be found in pure form in nature. In light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is false but Statement II is true (2) Both Statement I and Statement II are true (3) Statement I is true but Statement II is false (4) Both Statement I and Statement II are false

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

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

Q45.The F− ions make the enamel on teeth much harder by converting hydroxyapatite (the enamel on the surface of teeth) into much harder fluoroapatite having the formula. (1) [3 (Ca3(PO4)2) ⋅Ca(OH)2] (2) [3 (Ca3(PO4)3) ⋅CaF2] (3) [3 (Ca2(PO4)2) ⋅Ca(OH)2] (4) [3 (Ca3(PO4)2) ⋅CaF2]

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−