Practice Questions

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.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 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.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 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.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.In Dumas method for the estimation of N2 , the sample is heated with copper oxide and the gas evolved is passed over: (1) Copper gauze (2) Pd (3) Ni (4) Copper oxide

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

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

Q44.Match List I with List II. List I List II A.van't Hoff I. Cryoscopic constant factor, i B. kf II. Isotonic solutions Solutions with same C. III. Normal molar mass osmotic pressure Abnormal molar mas Solutions with same composition D.Azeotropes IV. of vapour above it Choose the correct answer from the options given below: (1) A-III, B-I, C-II, D-IV (2) A-III, B-II, C-I, D-IV (3) A-III, B-I, C-IV, D-II (4) A-I, B-III, C-II, D-IV

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.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.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