Practice Questions

Q41.Structures of BeCl2 in solid state, vapour phase and at very high temperature respectively are: (1) Monomeric, Dimeric, Polymeric (2) Dimeric, Polymeric, Monomeric (3) Polymeric, Monomeric, Dimeric (4) Polymeric, Dimeric, Monomeric

Q41.The correct order of pKa values for the following compounds is: (1) c > a > d > b (2) b > d > a > c (3) b > a > d > c (4) a > b > c > d

Q41.Given below are two statements: Statement I: Sulphanilic acid gives esterification test for carboxyl group. Statement II: Sulphanilic acid gives red colour in Lassigne’s test for extra element detection. In the light of the above statements, choose the most appropriate answer from the options given below: JEE Main 2023 (01 Feb Shift 2) JEE Main Previous Year Paper (1) Statement I is correct but Statement II is (2) Both Statement I and Statement II are incorrect incorrect. (3) Both Statement I and Statement II are correct (4) Statement I is incorrect but Statement II is correct.

Q41.Which of the following expressions is correct in case of a CsCl unit cell (edge length ‘ a ’) ? JEE Main 2023 (15 Apr Shift 1) JEE Main Previous Year Paper (1) rCs+ + rCl−= a2 (2) rCs+ + rCl−= √32 a (3) rCs+ + rCl−= a (4) rCs+ + rCl−= a √2

Q41.When Cu2 + ion is treated with KI, a white precipitate, X appears in solution. The solution is titrated with sodium thiosulphate, the compound Y is formed. X and Y respectively are (1) X = Cu2I2, Y = Na2S4O5 (2) X = Cu2I2, Y = Na2S4O6 (3) X = CuI2, Y = Na2S4O3 (4) X = CuI2, Y = Na2S4O6

Q41.Some reactions of NO2 relevant to photochemical smog formation are Identify A, B, X and Y (1) X = [O], Y = NO, A = O2, B = O3 (2) X = N2O, Y = [O], A = O3, B = NO (3) X = 12 O2, Y = NO2, A = O3, B = O2 (4) X = NO, Y = [O], A = O2, B = N2O3 JEE Main 2023 (25 Jan Shift 1) JEE Main Previous Year Paper

Q41.The difference between electron gain enthalpies will be maximum between : (1) Ne and F (2) Ar and F (3) Ne and Cl (4) Ar and Cl

Q42.The Lewis acid character of boron tri halides follows the order: (1) BCl3 > BF3 > BBr3 > Bl3 (2) Bl3 > BBr3 > BCl3 > BF3 (3) BBr3 > Bl3 > BCl3 > BF3 (4) BF3 > BCl3 > BBr3 > Bl3

Q42.Which will undergo deprotonation most readily in basic medium? (1) a only (2) c only (3) Both a and c (4) b only

Q42.Which of the following is correct order of ligand field strength? (1) CO < en < NH3 < C2O42 - < S2 - (2) S2 - < C2O42 - < NH3 < en < CO (3) NH3 < en < CO < S2 - < C2O42 - (4) S2 - < NH3 < en < CO < C2O42 -

Q42.From the figure of column chromatography given below, identify incorrect statements. JEE Main 2023 (06 Apr Shift 2) JEE Main Previous Year Paper A . Compound ‘ c’ is more polar than ‘ a ’ and ‘ b ’ B. Compound ‘ a ’ is least polar C. Compound ‘ b’ comes out of the column before ‘ c’ and after ‘ a ’ D . Compound ‘ a ’ spends more time in the column Choose the correct answer from the options given below (1) A, B and D only (2) A, B and C only (3) B and D only (4) B, C and D only

Q42.Match List I with List II: List II List I (Mixture) (Separation Technique) (A) CHCl3 + C6H5 NH2 I Steam distillation JEE Main 2023 (30 Jan Shift 2) JEE Main Previous Year Paper Differential (B) C6H14 + C5H12 II extraction (C) C6H5 NH2 + H2O III Distillation Fractional (D) Organic compound in H2O IV distillation (1) A-IV, B-I, C-III, D-II (2) A-III, B-IV, C-I, D-II (3) A-II, B-I, C-III, D-IV (4) A-III, B-I, C-IV, D-II

Q42.Highest oxidation state of Mn is exhibited in Mn2O7. The correct statements about Mn2O7 are (A) Mn is tetrahedrally surrounded by oxygen atoms (B) Mn is octahedrally surrounded by oxygen atoms (C) Contains Mn - O - Mn bridge (D) Contains Mn - Mn bond. Choose the correct answer from the options given below (1) A and C only (2) A and D only (3) B and D only (4) B and C only

Q42.Compound that will give positive Lassaigne's test for both nitrogen and halogen is (1) N2H4 ⋅HCl (2) CH3 NH2. HCl (3) NH4 Cl (4) NH2 OH. HCl

Q42.Match List I with List II List I List II Oxide Type of bond A N2O4 I 1 N = O bond B NO2 II 1 N – O – N bond C N2O5 III 1 N – N bond D N2O IV 1 N = N / N ≡ N bond Choose the correct answer from the options given below : (1) A - III, B - I, C - II, D - IV (2) A - II, B - IV, C - III, D - I (3) A - III, B - I, C - IV, D - II (4) A - II, B - I, C - III, D - IV

Q42.Which of the Phosphorus oxoacid can create silver mirror from AgNO3 solution? (1) HPO3n (2) H4P2O5 (3) H4P2O6 (4) H4P2O7

Q42.The isomeric deuterated bromide with molecular formula C4H8 DBr having two chiral carbon atoms is (1) 2-Bromo-1-deuterobutane (2) 2-Bromo-2-deuterobutane (3) 2-Bromo-3-deuterobutane (4) 2-Bromo-1-deutero-2-methylpropane

Q42.A cubic solid is made up of two elements X and Y. Atoms of X are present on every alternate corner and one at 1 rd the center of cube. Y is at 3 of the total faces. The empirical formula of the compound is (1) X2Y1.5 (2) X1.5Y (3) XY2.5 (4) X1.5Y2

Q43.To inhibit the growth of tumours, identify the compounds used from the following: (A) EDTA (B) Coordination Compounds of Pt (C) D-Penicillamine (D) Cis - Platin Choose the correct answer from the option given below: (1) B and D Only (2) C and D Only (3) A and B Only (4) A and C Only

Q43.The strongest acid from the following is (1) (2) (3) (4)

Q43.Which of the following complex will show largest splitting of d-orbitals? (1) FeC2O43 3 - (2) FeF6 3 - (3) Fe ( CN 3 - (4) 3 + ) 6 FeNH36

Q43.The correct group of halide ions which can be oxidised by oxygen in acidic medium is (1) Br– and I– only (2) Br– only (3) I– only (4) Cl– , Br– and I– only

Q43. Be(OH)2 reacts with Sr(OH)2 to yield an ionic salt. Choose the incorrect option related to this reaction from the following (1) Both Sr and Be elements are present in the ionic (2) Beis tetrahedrally coordinated in the ionic salt salt (3) The element Be is present in the cationic part of (4) The reaction is an example of acid-base the ionic salt neutralization reaction

Q43.When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral FeCl3, it gave deep red colour which disappeared on boiling and a brown red ppt was formed. The mixture contains (1) SO32 - &CH3COO- (2) CH3COO-&NO3- (3) SO32 - &C2O42 - (4) C2O42 - &NO3-

Q43.Correct statements for the given reaction are: JEE Main 2023 (12 Apr Shift 1) JEE Main Previous Year Paper A. Compound ‘ B ’ is aromatic B. The completion of above reaction is very slow C. ‘ A ’ shows tautomerism D. The bond lengths of C −C in compound B are found to be same Choose the correct answer from the options given below. (1) B, C and D only (2) A, B and C only (3) A, C and D only (4) A, B and D only