Practice Questions

Q37.Given below are two statements: Statement (I) : SiO2 and GeO2 are acidic while SnO and PbO are amphoteric in nature. Statement (II) : Allotropic forms of carbon are due to property of catenation and pπ - dπ bond formation. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both Statement I and Statement II are false (2) Both Statement I and Statement II are true (3) Statement I is true but Statement II is false (4) Statement I is true but Statement II is true

Q37.Product A and B formed in the following set of reactions are: (1) (2) (3) (4)

Q37.The final product A, formed in the following reaction sequence is: (1) Ph - CH2 - CH2 - CH3 (2) (3) (4) Ph - CH2 - CH2 - CH2 - OH

Q37.Given below are two statements : Statement I: Group 13 trivalent halides get easily hydrolysed by water due to their covalent nature. Statement II: AlCl3 upon hydrolysis in acidified aqueous solution forms octahedral AlH2O6 3 + ion. In the light of the above statements, choose the correct answer from the options given below : (1) Statement I is true but statement II is false (2) Statement I is false but statement II is true (3) Both statement I and statement II are false (4) Both statement I and statement II are true

Q37.The incorrect statement regarding the geometrical isomers of 2-butene is : (1) cis-2-butene and trans-2-butene are not (2) cis-2-butene and trans-2-butene are interconvertible at room temperature. stereoisomers. (3) cis-2-butene has less dipole moment than trans-2- (4) trans-2-butene is more stable than cis-2-butene. butene. JEE Main 2024 (06 Apr Shift 2) JEE Main Previous Year Paper

Q37.Which of the following molecule/species is most stable? (1) (2) (3) (4)

Q37.Among the following halogens F2, Cl2, Br2 and I2 Which can undergo disproportionation reactions? (1) F2, Cl2 and Br2 (2) F2 and Cl2 (3) Only I2 (4) Cl2, Br2 and I2

Q38.Thiosulphate reacts differently with iodine and bromine in the reactions given below: 2 S2O2−3 + I2 →S4O2−6 + 2I− Which of the following statement justifies the above dual S2O2−3 + 5Br2 + 5H2O →2SO2−4 + 4Br−+ 10H+ behaviour of thiosulphate? (1) Bromine is a stronger oxidant than iodine (2) Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reaction (3) Bromine is a weaker oxidant than iodine (4) Bromine undergoes oxidation and iodine undergoes reduction in these reactions

Q38.The correct stability order of the following resonance structures of CH3 −CH = CH −CHO is (1) I > II > III (2) II > III > I (3) II > I > III (4) III > II > I

Q38. Identify (B) and (C) and how are (A) and (C) related ? (1) (2) (3) (4)

Q38.Given below are two statements : Statement (I) : Kjeldahl method is applicable to estimate nitrogen in pyridine. Statement (II) : The nitrogen present in pyridine can easily be converted into ammonium sulphate in Kjeldahl method. 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) Both Statement I and Statement II are false (3) Statement I is false but Statement II is true (4) Statement I is true but Statement II is false

Q38.Relative stability of the contributing structures is : (1) (I) > (II) > (III) (2) (I) > (III) > (II) (3) (II) > (I) > (III) (4) (III) > (II) > (I)

Q38.Match List I with List II LIST I (Technique) LIST II (Application) A. Distillation I. Separation of glycerol from spent-lye B. Fractional distillation II. Aniline - Water mixture C. Steam distillation III. Separation of crude oil fractions D. Distillation under reduced pressure IV. Chloroform-Aniline Choose the correct answer from the options given below: (1) A-IV, B-I, C-II, D-III (2) A-IV, B-III, C-II. D-I (3) A-I. B-II, C-IV, D-III (4) A-II, B-III. C-I, D-IV

Q38.Which among the following has highest boiling point? (1) CH3CH2CH2CH3 (2) CH3CH2CH2CH2 - OH (3) CH3CH2CH2CHO (4) H5C2 - O - C2H5

Q38. List - I List - II (Pair of compounds) (Isomerism) (A) n-propanol and Isopropanol (I) Metamerism Match List I with List II Choose the (B) Methoxypropane and ethoxyethane (II) Chain Isomerism (C) Propanone and propanal (III) Position Isomerism (D) Neopentane and Isopentane (IV) Functional Isomerism correct answer from the options given below : (1) (A)-(II), (B)-(I), (C)-(IV), (D)-(III) (2) (A)-(III), (B)-(I), (C)-(II), (D)-(IV) (3) (A)-(I), (B)-(III), (C)-(IV), (D)-(II) (4) (A)-(III), (B)-(I), (C)-(IV), (D)-(II)

Q38.Given below are two statements : Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution. Statement (II) : In this titration phenolphthalein can be used as indicator. In the light of the above statements, choose the most appropriate answer from the options given below: (1) Both Statement I and Statement II are correct (2) Statement I is correct but Statement II is incorrect (3) Statement I is incorrect but Statement II is (4) Both Statement I and Statement II are incorrect correct

Q38.Identify structure of 2, 3-dibromo-1-phenylpentane. (1) (2) (3) (4)

Q38.Compound A formed in the following reaction reacts with B gives the product C. Find out A and B. (1) A = CH3 −C ≡C−Na+, B = CH3 −CH2 −CH2 −Br (2) A = CH3 −CH = CH2, B = CH3 −CH2 −CH2 −Br (3) A = CH3 −CH2 −CH3, B = CH3 −C ≡CH (4) A = CH3 −C ≡C−Na+, B = CH3 −CH2 −CH3

Q39. Total number of stereo isomers possible for the given structure : (1) 2 (2) 4 (3) 3 (4) 8

Q39.The solution from the following with highest depression in freezing point/lowest freezing point is (1) 180 g of acetic acid dissolved in 1 L of (2) 180 g of acetic acid dissolved in benzene aqueous solution. (3) 180 g of benzoic acid dissolved in benzene (4) 180 g of glucose dissolved in water

Q39.Give below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: The stability order of +1 oxidation state of Ga, In and T1 is Ga < In < T1. Reason R: The inert pair effect stabilizes the lower oxidation state down the group. In the light of the above statements, choose the correct answer from the options given below: JEE Main 2024 (08 Apr Shift 1) JEE Main Previous Year Paper (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 .

Q39.In qualitative test for identification of presence of phosphorous, the compound is heated with an oxidising agent. Which is further treated with nitric acid and ammonium molybdate respectively. The yellow coloured precipitate obtained is : (1) Na3PO4 ⋅12MoO3 (2) (NH4)3PO4 ⋅12MoO3 (3) MoPO4.21NH4NO3 (4) (NH4)3PO4 ⋅12(NH4)2MoO4

Q39.Which of the following statements are correct? A. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point. B. Aniline can be purified by steam distillation as aniline is miscible in water. C. Ethanol can be separated from ethanol water mixture by azeotropic distillation because it forms azeotrope. D. An organic compound is pure, if mixed M.P. is remained same. Choose the most appropriate answer from the options given below : (1) A, B, C only (2) A, C, D only (3) A, B, D only (4) B, C, D only

Q39.Identify the product A and product B in the following set of reactions. (1) (2) A - CH3CH2CH3 B −CH3CH2CH3 (3) A −CH3CH2CH2 −OH B −CH3CH2CH2 −OH (4)

Q39.Arrange the following elements in the increasing order of number of unpaired electrons in it. (A) Sc (B) Cr (C) V (D) Ti (E) Mn Choose the correct answer from the options given below : (1) (A) < (D) < (C) < (B) < (E) (2) (C) < (E) < (B) < (A) < (D) (3) (A) < (D) < (C) < (E) < (B) (4) (B) < (C) < (D) < (E) < (A)