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79. The major product in the following reaction is Major Product Formed from Ethyl Acetoacetate and 1,4-Dibromobutane (Acetoacetic Ester Synthesis) Correct Answer ✅ Correct Option: (C) Understanding the Reaction Ethyl […]

78. The compound meso 2,3-dibromobutane is obtained by (A)electrophilic addition of HBr to (E)-1-bromobut-2-ene (B) electrophilic addition of Br2 to (E)-2-butene (C) electrophilic addition of Br2 to (Z)-2-butene (D) nucleophilic […]

77. The major product(s) produced by gas phase UV irradiation of 2-pentanone is (are) (A) acetone and ethene (B) acetic acid and propionic acid (C) 2-pentanol (D) cyclopentane Major Products […]

76. The number of phosphorous-hydrogen bonds in H3PO2 is Number of Phosphorus-Hydrogen Bonds in H₃PO₂ (Hypophosphorous Acid) Correct Answer ✅ Correct Answer: 2 Understanding the Structure of H₃PO₂ H₃PO₂ is […]

75. The deactivation rate constant of an enzyme is 0.346 h–1. Assuming that the deactivation process follows first order kinetics, the half life of the enzyme in minutes is Half-Life […]

74. The pH of a 0.1 M solution of monosodium succinate (pKa1 = 4.19 and pKa2 = 5.57) is How to Calculate the pH of a 0.1 M Monosodium Succinate […]

73. Among the following pairs of co-ordination compounds, the pair(s) which represent(s) a case of “ionization isomerism” is (are): (A) [Pt(en)2Cl2]Br2 and [Pt(en)2Br2]Cl2 (B) [Cr(NH3)4ClBr]NO2 and [Cr(NH3)4ClNO2]Br (C)[Co(NH3)6][Cr(CN)6] and[Cr(NH3)6][Co(CN)6] (D)[Co(NH3)5Br]SO4 […]

72. The superoxide ion, O –, is produced by the reaction K+O →KO . The correct statement(s) pertaining to oxygen and superoxide ion is (are): (A) oxygen is paramagnetic and […]

71. The rate constant for the reaction O (g) + O3 (g) → 2O2 (g) is 8.0 × 10–15 cm3 molecule–1 s–1. The rate constant in dm3 mol–1 s–1, would […]

70. The speed of an electron (v), in the lowest energy orbit in the Bohr model of the Hydrogen atom divided by the speed of light in vacuum (c), is […]