Practice Questions

Q42.The number of possible isomeric products formed when 3 -chloro- 1 -butene reacts with HCl through carbocation formation is.........

Q42.Testosterone, which is a steroidal hormone, has the following structure. The total number of asymmetric carbon atom/s in testosterone is ____________. Q43. ‘ X ’ is: JEE Main 2023 (01 Feb Shift 2) JEE Main Previous Year Paper (1) (2) (3) (4)

Q43.What is the mass ratio of ethylene glycol ( C2H6O2 , molar mass = 62 g/ mol) required for making 500 g of 0. 25 molal aqueous solution and 250 mL of 0. 25 molar aqueous solution? (1) 1 : 1 (2) 3 : 1 (3) 2 : 1 (4) 1 : 2

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.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.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.Given below are two statements : Statement I : under Clemmensen reduction conditions will give Statement II : under Wolff-Kishner reduction condition will give In the light of the above statements, choose the correct answer from the options given below : (1) Statement I is false but Statement II is true (2) Both Statement I and Statement II are false (3) Statement I is true but Statement II is false (4) Both Statement I and Statement II are true

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

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.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.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.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.

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

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.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.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.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.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.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.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.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+