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Q.12 The major product from the following reaction is Problem Overview The given reaction sequence involves three electrophilic aromatic substitution (EAS) steps on tert-butylbenzene: SO₃ / H₂SO₄ → Sulfonation HNO₃ […]

Q.11 Among the following reactions, the one that produces achiral alcohol (after hydrolysis) is Introduction Grignard reagents are powerful nucleophiles that react with carbonyl compounds to form alcohols after hydrolysis. […]

Q.10 In compounds K4[Fe(CN)6] (P) and Fe(CO)5 (Q), the iron metal centre is bonded to (A) C of CN− in P and C of CO in Q (B) N of […]

Q.9 Among the following pairs, the paramagnetic and diamagnetic species, respectively, are (A) CO and O2− (B) NO and CO (C) O22−and CO (D) NO+and O2− CO is diamagnetic while […]

Q.8 Stability of [CrCl6]3− (X), [MnCl6]3− (Y) and [FeCl6]3− (Z) follows the order (Given: Atomic numbers o Cr = 24 Mn = 25 and Fe = 26) (A) X > […]

Q.7 If 50 mL of 0.02 M HCl is added to 950 mL of H2O, then the pH of the final solution will be________ Diluting 50 mL of 0.02 M […]

Q.6 If the radius of first Bohr orbit is 0.53 Å, then the radius of the third Bohr orbit is (A) 2.12 Å (B) 4.77 Å (C) 1.59 Å (D) […]

Q.5 Among the following diagrams, the one that correctly describes a zero order reaction (X → product) is (Given: [X]o = initial concentration of reactant X; [X] = concentration of […]

Q.4 For the electrochemical reaction Cu2+(aq) + Zn(s) ⇌ Cu(s) + Zn2+(aq), the equilibrium constant at 25 °C is 1.7 × 1037. The change in standard Gibbs free energy (ΔG°) […]

Q.3 The number of possible enantiomeric pair(s) in HOOC−CH(OH)−CH(OH)−COOH is________ Tartaric acid, HOOC-CH(OH)-CH(OH)-COOH, has two chiral carbons, leading to specific stereoisomers. The number of possible enantiomeric pairs is 1 due […]