Practice Questions

Q54.See the following chemical reaction: Cr2O72 - + XH+ + 6Fe2 + →YCr3 + + 6Fe3 + + ZH2O The sum of X, Y and Z is

Q54.The complex cation which has two isomers is: (1) [Co (H2O)6]3+ (2) [Co (NH3)5 Cl]2+ (3) [Co (NH3)5 NO2]2+ (4) [Co (NH3)5 Cl]+

Q54.The correct order of spin only magnetic moments for the following complex ions is (1) [Fe(CN)6]3−< [CoF6]3−< [MnBr4]2−< [Mn(CN)6]3−(2) [CoF6]3−< [MnBr4]2−< [Fe(CN)6]3−< [Mn(CN)6]3− (3) [Fe(CN)6]3−< [Mn(CN)6]3−< [CoF6]3−< [MnBr4]2−(4) [MnBr4]2−< [CoF6]3−< [Fe(CN)6]3−< [Mn(CN)6]3−

Q54.A 300mL bottle of soft drink has 0 . 2MCO2 dissolved in it. Assuming CO2 behaves as an ideal gas, the volume of the dissolved CO2 at STP is _____ mL. (Nearest integer) Given: At STP, molar volume of an ideal gas is 22 . 7L mol-1

Q54.A ( g ) ⇌2 B ( g ) + C ( g ) For the given reaction, if the initial pressure is 450 mmHg and the pressure at time t is720 mmHg at a constant temperatureT and constant volume V. The fraction of A ( g ) decomposed under these conditions is x × 10-1. The value of x is (nearest integer)

Q54.The observed magnetic moment of the complex [Mn(NCS)6)]x− is 6. 06 BM. The numerical value of x is

Q54.The sum of bridging carbonyls in W(CO)6 and Mn2 (CO)10 is _____ .

Q54.In the following halogenated organic compounds the one with maximum number of chlorine atoms in its structure is: (1) Chloral (2) Gammaxene (3) Chloropicrin (4) Freon- 12

Q54.In the following reaction, ‘ B’ is (1) (2) (3) (4)

Q54.The vapour pressure of 30% (w/v), aqueous solution of glucose is ________ mm Hg at 25∘C . JEE Main 2023 (15 Apr Shift 1) JEE Main Previous Year Paper [Given: The density of 30% (w/v), aqueous solution of glucose is 1. 2 g cm–3 and vapour pressure of pure water is 24 mm Hg.] (Molar mass of glucose is 180 g mol–1 )

Q54.(i) X(g) ⇌Y(g) + Z(g) Kp1 = 3 (ii) A(g) ⇌2 B( g) Kp2 = 1 If the degree of dissociation and initial concentration of both the reactants X ( g ) and A ( g ) are equal, then 𝑝1 the ratio of the total pressure at equilibrium is equal to x: 1. The value of x is (Nearest integer) 𝑝2

Q54.Find out the major product from the following reaction. (1) (2) (3) (4) Q55.' A ' in the given reaction is JEE Main 2023 (25 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q54.For reaction: SO2 ( g) + 12O2 the same reaction is × 1013 . ( Nearest integer) (Given R = 0 . 082 L atm K-1 mol-1 )

Q54.The value of log K for the reaction A ⇌B at 298 K is _______ . (Nearest integer) Given: 𝛥H° = - 54 . 07 kJ mol-1 𝛥S° = 10JK-1 mol-1 (Taken 2 . 303 × 8 . 314 × 298 = 5705 )

Q54.Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Acetal/Ketal is stable in basic medium. Reason R: The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium. 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

Q54.Match List I with List II LIST-I LIST-II Complex Colour JEE Main 2023 (11 Apr Shift 2) JEE Main Previous Year Paper A. Mg(NH4) PO4 I. brown B. K3[Co (NO2)6] II. white C. MnO (OH)2 III. yellow D. Fe4 [Fe (CN)6]3 IV. blue Choose the correct answer from the options given below: (1) A-III, B-IV, C-II, D-I (2) A-II, B-III, C-I, D-IV (3) A-II, B-IV, C-I, D-III (4) A-II, B-III, C-IV, D-I

Q54. The number of hyperconjugation structures involved to stabilize carbocation formed in the above reaction is __________.

Q54.The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement) (1) 1-Bromo- 2 -methylbutane (2) 2-Bromopropane (3) 2-Bromopentane (4) 2-Bromo- 3, 3-dimethylpentane

Q55.The correct order in aqueous medium of basic strength in case of methyl substituted amines is: JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper (1) Me2 NH > MeNH2 > Me3 N > NH3 (2) Me2 NH > Me3 N > MeNH2 > NH3 (3) NH3 > Me3 N > MeNH2 > Me2 NH (4) Me3 N > Me2 NH > MeNH2 > NH3

Q55.Identify the correct order for the given property for following compounds Choose the correct answer from the option given below :- (1) (B), (C) and (D) only (2) (A), (C) and (E) only (3) (A), (C) and (D) only (4) (A), (B) and (E) only

Q55.Given below are two statements, one is labelled as assertion A and the other is labelled as Reason R. assertion A : [CoCl (NH3)5]2+ absorbs at lower wavelength of light with respect to [Co (NH3)5(H2O)]3+ Reason R: It is because the wavelenght of light absorbed depends on the oxidation state of the metal ion. In the light of the above statements,choose the correct answer from the options given below: (1) A is false but R is true (2) A is true but R is false (3) Both A and R are true and R is the correct (4) Both A and R are true and R is NOT the correct explaination of A explaination of A

Q55.The number of endothermic process/es from the following is _______. A. I2 ( g ) →2I ( g ) B. HCl ( g ) →H ( g ) + Cl ( g ) C. H2O ( l ) →H2O ( g ) D. C ( s ) + O2 ( g ) →CO2 ( g ) E. Dissolution of ammonium chloride in water

Q55.Find out the major product for the following reaction JEE Main 2023 (29 Jan Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q55.Choose the halogen which is most reactive towards SN1 reaction in the given compounds (A, B, C & D) A. B. C. D. (1) A −Br(b); B −I(a); C −Br(a); D −Br(a) (2) A −Br(b); B −I(b); C −Br(b); D −Br(b) (3) A −Br(a); B −I(a); C −Br(b); D −Br(a) (4) A −Br(a); B −I(a); C −Br(a); D −Br(a) JEE Main 2023 (08 Apr Shift 1) JEE Main Previous Year Paper

Q55.The number of correct statements from the following is ___________ (A) Conductivity always decreases with decrease in concentration for both strong and weak electrolytes. (B) The number of ions per unit volume that carry current in a solution increases on dilution. (C) Molar conductivity increases with decrease in concentration. (D) The variation in molar conductivity is different for strong and weak electrolytes. (E) For weak electrolytes, the change in molar conductivity with dilution is due to decrease in degree of dissociation.