Practice Questions

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

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

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

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

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

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

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

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

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.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]

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

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

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−

Q47.Phenolic group can be identified by a positive: (1) Phthalein dye test (2) Lucas test (3) Tollen’s test (4) Carbylamine test

Q47.Which one the following compounds will readily react with dilute NaOH ? (1) C2H5OH (2) C6H5OH (3) C6H5CH2OH (4) (CH3)3COH

Q47.Identify the name reaction. (1) Stephen reaction (2) Etard reaction (3) Gatterman-koch reaction (4) Rosenmund reduction

Q47.Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: 𝑝𝐾𝑎 value of phenol is 10 . 0 while that of ethanol is 15 . 9. Reason R: Ethanol is stronger acid than phenol. In the light of the above statements, choose the correct answer from the options given below: (1) A is true but R is false (2) A is false but R is true (3) Both A and R are true and R is the correct (4) Both A and R are true but R is NOT the correct explanation of A explanation of A.

Q48. Identify the product in the following reaction : (1) (2) (3) (4)