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13. Which compound is most acidic? a. H2O b. H2S c. H2Se d. NH3 The most acidic compound is H₂Se (option c). Among H₂O, H₂S and H₂Se, acidity increases down […]

12. Consider a reversible reaction 𝐴 ⇌ 𝐵 with forward and backward rate constants 𝑘! = 𝑘! = 1 sec!!. Suppose we start with a 1 molar solution of A. […]

11. 4.8g of gas at 27°C occupied the same volume as 1g of hydrogen at 17°C and at the same pressure. What is the molecular weight of the gas? a. […]

10. Which of the following compounds does not undergo ozonolysis reaction? a. 3-methyl-1-butene b. 2,3-dimethyl-butane c. 2-methyl-2-butene d. 2-methyl-1-butene Answer: b. 2,3-dimethyl-butane Ozonolysis cleaves carbon-carbon double bonds in alkenes to […]

9. Which of the following amino acids is commonly used in catalysis by enzyme? a. Alanine b. Arginine c. Serine d. Methionine Serine is the correct answer (option c). Serine […]

8. For an endothermic reaction, where 𝛥𝐻 represents the enthalpy of the reaction in kJ/mol, the minimum value for the energy of activation will be: a. Less than 𝛥𝐻 b. […]

7. Among the following, the one that gives positive Iodoform test upon reaction with I2 and NaOH is: (A) (B) (C) (D) a. Molecule (A) b. Molecule (B) c. Molecule […]

6. A helium atom is heavier than a hydrogen molecule. At 298 K, the average kinetic energy of a helium atom is a. twice that of a hydrogen molecule b. […]

5. When a non-volatile solute is dissolved in a pure solvent, the difference between the freezing points of the solvent alone and the solution is a. positive b. negative c. […]

4. Which of the following molecules will have a dipole moment? a. CH4 b. NH3 c. CCl4 d. CO2 Which Molecules Have Dipole Moment: CH4, NH3, CCl4, CO2 Explained NH3 […]