Practice Questions

Q43.A metal M forms hexagonal close-packed structure. The total number of voids in 0. 02 mol of it is _____ ×1021 (Nearest integer) (Given NA = 6. 02 × 1023 )

Q43.Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R Assertion A: Sodium is about 30 times as abundant as potassium in the oceans. Reason R : Potassium is bigger in size than sodium. In the light of the above statements, choose the correct answer from the options given below (1) Both A and R are true and R is the correct (2) A is true but R is false explanation of A (3) Both A and R are true but R is NOT the correct (4) Both A and R are false explanation of A

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.The osmotic pressure of solutions of PVC in cyclohexanone at 300 K are plotted on the graph. The molar mass of PVC is g mol−1 (Nearest integer) (Given : R = 0. 083 L atm K−1 mol−1 )

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.Match List-I with . List-I List-II Name of reaction Reagent used A Hell-Volhard Zelinsky reaction I NaOH + I2 B Iodoform reaction II ( i ) CrO2Cl2, CS2 ( ii ) H2O C Etard reaction III ( i ) Br2 / red phosphorus ( ii ) H2O D Gatterman-Koch reaction IV CO, HCl, anhyd . AlCl3 Choose the correct answer from the options given below: JEE Main 2023 (06 Apr Shift 1) JEE Main Previous Year Paper (1) A →III; B →I; C →II; D →IV (2) A →I; B →II; C →III; D →IV (3) A →III; B →II; C →I; D →IV (4) A →III; B →I; C →IV; D →II

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

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.The number of P −O −P bonds in H4P2O7, (HPO3)3 , and P4O10 are respectively (1) 0, 3, 6 (2) 0, 3, 4 (3) 1, 2, 4 (4) 1, 3, 6

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

Q43.Ferric chloride is applied to stop bleeding because (1) Blood absorbs FeCl3 and forms a complex. (2) Cl-ions cause coagulation of blood. (3) Fe3 + ions coagulate blood which is a negatively (4) FeCl3 reacts with the constituents of blood which charged sol. is a positively charged sol.

Q44.Match List I with List II List I List II A I Fittig reaction B II Wurtz Fittig reaction JEE Main 2023 (30 Jan Shift 1) JEE Main Previous Year Paper C III Finkelstein reaction D C2H5Cl + NaI →C2H5I + Nacl IV Sandmeyer reaction (1) A–II, B–I, C–III, D–IV (2) A–III, B–II, C–IV, D–I (3) A–IV, B–II, C–III, D–I (4) A–II, B–I, C–IV, D–III

Q44.Consider the cell Pt(s)|H2( s)(latm)|H+(aq, [H+] = 1) Fe3+(aq), Fe2+(aq) ∣Pt (s) 1 H2°= 0 V, T = 298 K Given: EFe3+ / Fe2+°= 0. 771 V and EH+/ 2 If the potential of the cell is 0. 712 V the ratio of concentration of Fe2+ to Fe3+ is (Nearest integer)

Q44.The descending order of acidity for the following carboxylic acid is- (A) CH3 COOH (B) F3C −COOH JEE Main 2023 (08 Apr Shift 2) JEE Main Previous Year Paper (C) ClCH2 −COOH (D) FCH2 −COOH (E) BrCH2 −COOH Choose the correct answer from the options given below: (1) B > C > D > E > A (2) E > D > B > A > C (3) B > D > C > E > A (4) D > B > A > E > C

Q44.The number of pairs of the solution having the same value of the osmotic pressure from the following is (Assume 100% ionization) A. 0. 500 M C2H5 OH(aq) and 0. 25 M KBr(aq) B. 0. 100 M K4[Fe(CN)6](aq) and 0. 100 M FeSO4 (NH4)2 SO4(aq) C. 0. 05 M K4[Fe(CN)6] (aq) and 0. 25 M NaCl (aq) D. 0. 15 M NaCl(aq) and 0. 1 M BaCl2(aq) E. 0. 02 M KCl. MgCl2. 6H2O(aq) and 0. 05 M KCl(aq)

Q44.The complex with highest magnitude of crystal field splitting energy (Δ0) is (1) [Ti(OH2)6]3+ (2) [Cr (OH2)6]3+ (3) [Mn (OH2)6]3+ (4) [Fe (OH2)6]3+

Q44.The major product formed in the following reaction is A. B. JEE Main 2023 (11 Apr Shift 2) JEE Main Previous Year Paper C. D. choose the correct answer from the options Given below: (1) B only (2) A only (3) C only (4) D only

Q44.Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Benzene is more stable than hypothetical cyclohexatriene. Reason R : The delocalized π electron cloud is attracted more strongly by nuclei of carbon atoms. 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 correct and R is the correct (4) Both A and R are correct but R is NOT the explanation of A. correct explanation of A.

Q44.In the following reaction ‵X′ is Anhy.AlCl3 −CH3 (CH2)4 CH3 → X HCl major product △ (1) (2) (3) CH3 (CH2)4 CH2 Cl (4) Cl −CH2 −(CH2)4 −CH2 −Cl

Q44.The complex that dissolves in water is (1) NH43AsMo3O104 (2) Fe4Fe ( CN ) 63 (3) K3CoNO26 (4) Fe3 ( OH ) 2 ( OAc ) 6Cl

Q44.Which of the following are the example of double salt? (A) FeSO4 · NH42SO4 · 6H2O (B) CuSO4 · 4NH3 · H2O (C) K2SO4 · Al2SO43 · 24H2O (D) Fe ( CN · 4KCN ) 2 Choose the correct answer. (1) A and C only (2) A and B only (3) A, B and D only (4) B and D only

Q44.Which of the following statements are correct? (A) The M3 + / M2 + reduction potential for iron is greater than manganese. (B) The higher oxidation states of first row d-block elements get stabilized by oxide ion (C) Aqueous solution of Cr2 + can liberate hydrogen from dilute acid (D) Magnetic moment of V2 + is observed between 4 . 4 - 5 . 2 BM JEE Main 2023 (10 Apr Shift 1) JEE Main Previous Year Paper Choose the correct answer from the options given below: (1) B, C only (2) A, B, D only (3) C, D only (4) A, B only

Q44.Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R . Assertion A: The spin only magnetic moment value for Fe ( CN ) 3 - is 1 . 74 BM, whereas for [Fe(H2O)6] 6 FeH2O6 3 + is 5 . 92 BM . Reason B: In both complexes, Fe is present in +3 oxidation state. 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 but R is NOT the correct (4) Both A and R are true andR is the correct explanation of A explanation of A

Q44.Cobalt chloride when dissolved in water forms pink colored complex X which has octahedral geometry. This solution on treating with cone HCl forms deep blue complex, Y which has a Z geometry. X, Y and Z, respectively, are (1) X = CoH2O6 2 + , Y = CoCl4 2 - , Z = Tetrahedral(2) X = CoH2O6 2 + , Y = CoCl6 3 - , Z = Octahedral (3) X = CoH2O6 3 + , Y = CoCl6 3 - , Z = Octahedral(4) X = CoH2O4Cl2 +, Y = CoCl4 2 - , Z = Tetrahedral

Q44.The vapour pressure vs. temperature curve for a solution solvent system is shown below. The boiling point of the solvent is _____°C.