Practice Questions

Q40.The molar conductivity for electrolytes A and B are plotted against C 1/2 as shown below. Electrolytes A and B respectively are : (1) A: strong electrolyte ; B: weak electrolyte (2) A: weak electrolyte ; B: weak electrolyte (3) A: weak electrolyte ; B: strong electrolyte (4) A: strong electrolyte ; B: strong electrolyte

Q40.Given below are two statements: Statement (I) : Oxygen being the first member of group 16 exhibits only – 2 oxidation state. Statement (II) : Down the group 16 stability of +4 oxidation state decreases and +6 oxidation state increases. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Statement I is correct but Statement II is (2) Both Statement I and Statement II are correct incorrect (3) Both Statement I and Statement II are incorrect (4) Statement I is incorrect but Statement II is correct

Q40.Ionic reactions with organic compounds proceed through: (A) Homolytic bond cleavage (B) Heterolytic bond cleavage (C) Free radical formation (D) Primary free radical (E) Secondary free radical Choose the correct answer from the options given below: (1) (A) only (2) (C) only (3) (B) only (4) (D) and (E) only

Q40. Which of the following are aromatic? (1) A and C only (2) B and D only (3) C and D only (4) A and B only

Q40.The correct IUPAC name of [PtBr2(PMe3)2] is : (1) dibromodi(trimethylphosphine)platinum(II) (2) bis(trimethylphosphine)dibromoplatinum(II) (3) dibromobis(trimethylphosphine)platinum(II) (4) bis[bromo(trimethylphosphine)]platinum(II)

Q40.The ascending order of acidity of – OH group in the following compounds is : (A) Bu – OH Choose the correct answer from the options given below : (1) (A) < (D) < (C) < (B) < (E) (2) (C) < (A) < (D) < (B) < (E) (3) (C) < (D) < (B) < (A) < (E) (4) (A) < (C) < (D) < (B) < (E)

Q40.Identify product A and product B (1) (2) (3) (4)

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

Q40.For the Compounds : (A) H3C −CH2 −O −CH2 −CH2 −CH3 (B) H3C −CH22 −CH2 −CH2 −CH3 (C) (D) The increasing order of boiling point is : Choose the correct answer from the options given below : (1) (D) < ( C ) < ( A ) < ( B ) (2) (B) < (A) < (C) < (D) (3) (A) < (B) < (C) < (D) (4) (B) < (A) < (D) < (C)

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

Q40. Product P is JEE Main 2024 (04 Apr Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q40.Major product of the following reaction is: JEE Main 2024 (31 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

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

Q41.One of the commonly used electrode is calomel electrode. Under which of the following categories, calomel electrode comes? JEE Main 2024 (04 Apr Shift 1) JEE Main Previous Year Paper (1) Oxidation - Reduction electrodes (2) Metal ion - Metal electrodes (3) Gas - Ion electrodes (4) Metal - Insoluble Salt - Anion electrodes

Q41.Given below are two statements: Statement I : Gallium is used in the manufacturing of thermometers. Statement II : A thermometer containing gallium is useful for measuring the freezing point (256 K) of brine solution. In the light of the above statements, choose the correct answer from the options given below : (1) Both Statement I and Statement II are true (2) Statement I is false but Statement II is true (3) Both Statement I and Statement II are false (4) Statement I is true but Statement II is false

Q41.Which of the following statements are correct about Zn, Cd and Hg ? A. They exhibit high enthalpy of atomization as the d-subshell is full. B. Zn and Cd do not show variable oxidation state while Hg shows +I and + II. C. Compounds of Zn, Cd and Hg are paramagnetic in nature. D. Zn, Cd and Hg are called soft metals. Choose the most appropriate from the options given below: (1) B, D only (2) B, C only (3) A, D only (4) C, D only

Q41.Match List I with List II List - I (Cell) List - II (Use/Property/Reaction) Converts energy of combustion into electrical A. Leclanche cell I. energy Does not involve any ion in solution and is used Choose the correct B. Ni −Cd cell II. in hearing aids C. Fuel cell III. Rechargeable D. Mercury cell IV. Reaction at anode Zn →Zn2+ + 2e− answer from the options given below: (1) A-II, B-III, C-IV, D-I (2) A-I, B-II, C-III, D-IV (3) A-III, B-I, C-IV, D-II (4) A-IV, B-III, C-I, D-II

Q41.Given below are two statements: Statement I : Nitration of benzene involves the following step - Statement II : Use of Lewis base promotes the electrophilic substitution of benzene. In the light of the above statements, choose the most appropriate answer from the options given below : JEE Main 2024 (05 Apr Shift 1) JEE Main Previous Year Paper (1) Statement I is correct but Statement II is incorrect(2) Statement I is incorrect but Statement II is correct (3) Both Statement I and Statement II are correct (4) Both Statement I and Statement II are incorrect

Q41.The reaction; 1 2 H2( g) + AgCl(s) →H+(aq) + Cl−(aq) + Ag(s) occurs in which of the following galvanic cell : (1) Ag AgCl(s) KCl(soln.) AgNO3 (aq.) Ag (2) Pt H2( g) HCl(soln.) AgCl(s) Ag (3) Pt H2( g) KCl(soln. ) AgCl(s) Ag (4) Pt H2( g) HCl(soln.) AgNO3(aq) Ag −−

Q41. In the above chemical reaction sequence " A " and " B " respectively are (1) H2O, H+ and KMnO4 (2) O3, Zn/H2O and NaOH(alc) /I2 (3) O3, Zn/H2O and KMnO4 (4) H2O, H+ and NaOH(alc)/I2

Q41.The metals that are employed in the battery industries are A. Fe, B. Mn, C. Ni, D. Cr, E. Cd Choose the correct answer from the options given below: (1) B, C and E only (2) A, B, C, D and E (3) A, B, C and D only (4) B, D and E only

Q41.Diamagnetic Lanthanoid ions are: (1) Nd3+ and Eu3+ (2) La3+ and Ce4+ (3) Nd3+ and Ce4+ (4) Lu3+ and Eu3+ JEE Main 2024 (30 Jan Shift 1) JEE Main Previous Year Paper

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.In Kjeldahl's method for estimation of nitrogen, CuSO4 acts as : (1) Reducing agent (2) Catalytic agent (3) Hydrolysis agent (4) Oxidising agent