Practice Questions

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 magnetic moment of a transition metal compound has been calculated to be 3 . 87 BM. The metal ion is (1) Cr2 + (2) Mn2 + (3) V2 + (4) Ti2 +

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.Match List I with List II List-I List-2 Species Maximum allowed concentration in ppm in drinking water A F− I < 50 ppm JEE Main 2023 (08 Apr Shift 1) JEE Main Previous Year Paper B SO2−4 II < 5 ppm C NO−3 III < 2 ppm D Zn IV < 500 ppm Choose the correct answer from the options given below. (1) A-I, B-II, C-III, D-IV (2) A-II, B-I, C-III, D-IV (3) A-IV, B-III, C-II, D-I (4) A-III, B-II, C-I, D-IV

Q43.Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R . Assertion A: can be subjected to Wolff-Kishner reduction to give Reason R: Wolff-Kishner reduction is used to convert into 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 and R is NOT the correct explanation of A explanation of A

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.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.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.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.The covalency and oxidation state respectively of boron in BF4 -, are (1) 3 and 5 (2) 3 and 4 (3) 4 and 4 (4) 4 and 3

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.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.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 water quality of a pond was analysed and its BOD was found to be 4. The pond has (1) Highly polluted water (2) Water has high amount of fluoride compounds (3) Very clean water (4) Slightly polluted water

Q44.A hydrocarbon 'X' with formula C6H8 uses two moles of H2 on catalystic hydrogenation of its one mole. On ozonolysis, 'X' yields two moles of methane dicarbaldehyde. The hydrocarbon 'X' is : (1) hexa- 1, 3, 5 -triene (2) 1-methylcyclopenta- 1, 4−diene (3) cyclohexa −1, 3−diene (4) cyclohexa −1, 4−diene

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.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.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.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.The group of chemicals used as pesticide is (1) Aldrin, Sodium Chlorate, Sodium arsinite (2) DDT, Aldrin (3) Sodium chlorate, DDT, PAN (4) Dieldrin, Sodium arsinite, Tetrachloroethene

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