Practice Questions

Q40.The functional group that shows negative resonance effect is: (1) -NH2 (2) -OH (3) -COOH (4) -OR

Q40. Consider the given chemical reaction : Product " A " is : (1) picric acid (2) acetic acid (3) adipic acid (4) oxalic acid

Q40.Reduction potential of ions are given below: ClO4- IO4- BrO4- E° = 1 . 19 V ; E° = 1 . 65 V; E° = 1 . 74 V The correct order of their oxidising power is: (1) ClO4- > IO4- > BrO4- (2) BrO4- > IO4- > ClO4- (3) BrO4- > ClO4- > IO4- (4) IO4- > BrO4- > ClO4-

Q40.What happens to freezing point of benzene when small quantity of napthalene is added to benzene? (1) Increases (2) Remains unchanged (3) First decreases and then increases (4) Decreases

Q41.Lassaigne's test is used for detection of: (1) Nitrogen and Sulphur only (2) Nitrogen, Sulphur and Phosphorous Only (3) Phosphorous and halogens only (4) Nitrogen, Sulphur, and halogens

Q41.Choose the correct option having all the elements with d10 electronic configuration from the following: (1) 27Co, 28Ni, 26Fe, 24Cr (2) 29Cu, 30Zn, 48Cd, 47Ag (3) 46Pd, 28Ni, 26Fe, 24Cr (4) 28Ni, 24Cr, 26Fe, 29Cu

Q41.The quantity of silver deposited when one coulomb charge is passed through AgNO3 solution : (1) 1 g of silver (2) 1 electrochemical equivalent of silver (3) 1 chemical equivalent of silver (4) 0.1 g atom of silver

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)

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.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.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

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

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

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

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

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

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

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

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]