Practice Questions

Q42.For a strong electrolyte, a plot of molar conductivity against (concentration) 1/2 is a straight line, with a negative slope, the correct unit for the slope is (1) Scm2 mol−3/2 L−1/2 (2) Scm2 mol−3/2 L1/2 (3) Scm2 mol−3/2 L (4) Scm2 mol−1 L1/2

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.Choose the correct statements from the following A. All group 16 elements form oxides of general formula 𝐸𝑂2 and 𝐸𝑂3 where 𝐸= 𝑆, 𝑆𝑒, 𝑇𝑒 and 𝑃𝑜. Both the types of oxides are acidic in nature. B. 𝑇𝑒𝑂2 is an oxidising agent while 𝑆𝑂2 is reducing in nature. C. The reducing property decreases from 𝐻2𝑆 to 𝐻2𝑇𝑒 down the group. D. The ozone molecule contains five lone pairs of electrons. Choose the correct answer from the options given below: (1) A and D only (2) B and C only (3) C and D only (4) A and B only JEE Main 2024 (31 Jan Shift 2) 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.Match List-I with List-II List I (Species) List II (Electronic distribution) A. Cr+2 i. 3d8 B. Mn+ ii. 3d34s1 C. Ni+2 iii. . 3d4 D. V+ iv. 3d54s1 Choose the correct answer from the options given below: (1) (A)-I, (B)-II, (C)-III, (D)-IV (2) (A)-III, (B) - IV, (C) - I, (D)-II (3) (A)-IV, (B)-III, (C)-I, (D)-II (4) (A)-II, (B)-I, (C)-IV, (D)-III

Q42.In the given reactions identify A and B . (1) 𝐴 : 2–Pentyne B : trans – 2 – butene (2) A : n – Pentane B : trans – 2 – butene (3) A : 2 – Pentyne B : Cis – 2 – butene (4) A : n – Pentane B : Cis – 2 – butene

Q42.Give below are two statements: Statement I : The higher oxidation states are more stable down the group among transition elements unlike p-block elements. Statement II : Copper can not liberate hydrogen from weak acids. 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

Q42.Which of the following compound will most easily be attacked by an electrophile? (1) (2) (3) (4) JEE Main 2024 (01 Feb Shift 1) JEE Main Previous Year Paper

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. List - I List - II Reaction Type of redox reaction (A) TiCl4 (I) e2, t02 Match List - I with List - II. Choose the correct answer from the (B) [FeO4]2− (II) e4, t32 (C) [FeCl4]− (III) e0, t02 (D) [CoCl4]2− (IV) e2, t32 options given below : (1) (A)-(III), (B)-(IV), (C)-(II), (D)-(I) (2) (A)-(IV), (B)-(III), (C)-(I), (D)-(II) (3) (A)-(III), (B)-(I), (C)-(IV), (D)-(II) (4) (A)-(I), (B)-(III), (C)-(IV), (D)-(II)

Q42.On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed? JEE Main 2024 (09 Apr Shift 1) JEE Main Previous Year Paper (1) Nitric oxide (2) Nitrous oxide (3) Lead nitrate (4) Sulphur Q43. 0.05MCuSO4 when treated with 0.01MK2Cr2O7 gives green colour solution of Cu2Cr2O7 . The two solutions are separated as shown below : [SPM : Semi Permeable Membrane] Due to osmosis : (1) Molarity of CuSO4 solution is lowered. (2) Molarity of K2Cr2O7 solution is lowered. (3) Green colour formation observed on side Y. (4) Green colour formation observed on side X.

Q42.For a reaction A K1→ B K2→ C If the rate of formation of B is set to be zero then the concentration of B is given by : (1) (K1 + K2)[A] (2) (K1/K2)[A] (3) (K1 −K2)[A] (4) K1 K2[ A]

Q42.What will be the decreasing order of basic strength of the following conjugate bases? –– −OH, RO, CH3COO, C–I –––– (1) RO > −OH > CH3COO > C–I (2) C–l > RO > −OH > CH3COO –––– (3) −OH > RO > CH3COO > C–1 (4) C–I > −OH > RO > CH3COO

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.The arenium ion which is not involved in the bromination of Aniline is (1) (2) (3) (4)

Q42.Given below are two statements: Statement (I) : In the Lanthanoids, the formation of Ce+4 is favoured by its noble gas configuration. Statement (II) : Ce+4 is a strong oxidant reverting to the common +3 state. In the 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

Q42.Identify the factor from the following that does not affect electrolytic conductance of a solution. (1) The nature of the electrolyte added. (2) The nature of the electrode used. (3) Concentration of the electrolyte. (4) The nature of solvent used.

Q42.For the electro chemical cell If E0 = 0.46 V and E0 = 0.34 V. Which of the following is correct? (M2+/M) (x/X2−) (1) M + X →M2+ + X2− is a spontaneous reaction (2) Ecell = 0.80 V (3) Ecell = −0.80 V (4) M2+ + X2−→M + X is a spontaneous reaction

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.Choose the correct statements from the following A. Mn2O7 is an oil at room temperature B. V2O4 reacts with acid to give VO22 + C. CrO is a basic oxide D. V2O5 does not react with acid Choose the correct answer from the options given below: (1) A, B and D only (2) A and C only (3) A, B and C only (4) B and C only

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

Q43.Choose the correct Statements from the following: (A) Ethane −1 , 2 −diamine is a chelating ligand. (B) Metallic aluminium is produced by electrolysis of aluminium oxide in presence of cryolite. (C) Cyanide ion is used as ligand for leaching of silver. (D) Phosphine act as a ligand in Wilkinson catalyst. (E) The stability constants of Ca2+ and Mg2+ are similar with EDTA complexes. Choose the correct answer from the options given below: (1) (B), (C), (E) only (2) (C), (D), (E) only (3) (A), (B), (C) only (4) (A), (D), (E) only

Q43.Iron (III) catalyses the reaction between iodide and persulphate ions, in which A. Fe3+ oxidises the iodide ion B. Fe3+ oxidises the persulphate ion C. Fe2+ reduces the iodide ion D. Fe2+ reduces the persulphate ion Choose the most appropriate answer from the options given below: (1) B only (2) A only (3) B and C only (4) A and D only

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