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Q26 Which one of the following molecules (~ 1mg/mL) do NOT absorb at 280 nmin an aqueous solution of pH 7.00 at room temperature?(A) Poly deoxy–Guanylate (poly dG)(B) Adenosine triphosphate(C) Phenylalanine(D) […]

Q25. The freezing point of 80 g of acetic acid (freezing point constant 3.9 K kgmol-1) was lowered by 7.8 K due to the addition of 20 g of a […]

Q24. Given the standard reduction potentials, E°Ag+/Ag = 0.80 V and E°Mg2+/Mg = -2.37 V E° for Ag+/Ag(0.1 M) + Mg(s) → Ag(s) + Mg2+(aq, 0.2 M) at 25°C (K° […]

Q23. Is the total number of possible geometrical isomer(s) for [PtBrCl(NH3)(py)]0 is __________. (Given: py = Pyridine and atomic number of Pt = 78)   The square planar complex [PtBr(NH₃)py]²⁺ […]

Q22. Given the following standard heats of formation, ΔH°_f(PCl_3(g)) = 314 kJ mol-1, ΔH°_f(H_2(g)) = 0 kJ mol-1 and ΔH°_f(HCl(g)) = 218.0 kJ mol-1 (the average bond enthalpy of a […]

Q21. Among the following, the diamagnetic species is (are) (Given: Atomic numbers of Fe=26, Co=27, and Ni=28) (A) [CoF₆]³⁻ (B) [Ni(H₂O)₆]²⁺ (C) [Fe(CN)₆]³⁻ (D) [Co(NH₃)₆]³⁺ The diamagnetic species among the […]

Q20. The CORRECT combination(s) of Y and T for the following eliminationreaction is(are) E2 Elimination Reaction: Correct Y and T Combination for Major Product The question involves identifying the correct […]

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 […]