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Q19. The structure of the major product S of the following reaction is The major product S is option (B). This reaction represents Fischer glycosidation, where a sugar undergoes acid-catalyzed […]

Q18. For a reaction, X → ProductsGroup I contains three plots of reactant concentrations as functions oftime, where x = concentration of reactant X at time t; x0 = concentration […]

Q17. The O–O bond order in O22- species is(A) 0.5(B) 1.0(C) 1.5(D) 2.0 The O–O bond order in the O₂²⁻ (peroxide ion) species is 1.0. This matches option (B) in […]

Q16. The CORRECT order of acidity of the following compounds is(A) II > I > III(B) II > III > I(C) III > II > I(D) III > I > […]

Q15. A solution of a compound shows an absorbance of 0.275 at 275 nm in a cuvette with 0.1 dm light path. The molar absorptivity (ε275 = 4 × 104 […]

Q14. The ground state energy of an electron in a hydrogen atom is –13.60 eV.The energy of the electron in the third excited state is _________eV(rounded off to two decimal […]

Q13. The time taken by a first order reaction to reach 90% completion is 20 s.The time taken for the reaction to reach 50% completion is ___________ s(rounded off to […]

Q12. The structure of the major product Q of the following reaction is Grignard reagents react with epoxides under dry conditions followed by hydrolysis to yield primary alcohols via ring-opening […]

Q.11 The geometry of Fe(CO)5 is(Given: Atomic number of Fe = 26)(A) pentagonal planar(B) square pyramidal(C) trigonal bipyramidal(D) trigonal pyramidal Fe(CO)₅ exhibits trigonal bipyramidal geometry due to its coordination number […]

Q.10 Six students P, Q, R, S, T and U, with distinct heights, compare theirheights and make the following observations.Observation I: S is taller than R.Observation II: Q is the […]