The heat accompanying the reaction represented by the equation H₂O (l) → H₂O(g) is described as the heat of

• A. solution
• B. neutralization
• C. vaporization
• D. sublimation

If a given quantity of electricity liberates 0.65g of Zn²⁺, what amount of Hg²⁺ would be liberated by the same quantity of current?

• A. 1.00g
• B. 2.10g
• C. 4.02g
• D. 8.04g

Which of the following reactions is accompanied by the first ionization energy of an element X?

• A. X⁺(aq) → X²⁼ (aq) + e^-
• B. X^-(g) → X(g) + e^-
• C. X⁺ (g) → X⁺² +e^-
• D. X (g) → X⁺ (g) +e^-

Which of the following is an acidic salt?

• A)
  NaHSO₄
• B)
  Na₂SO₄
• C)
  CH₃CO₂Na
• D)
  Na₂S

Which of the following statements about chlorine and iodine at room temperature is correct?

• A. Chlorine is gas and iodine is solid
• B. Chlorine is liquid and iodine is gas
• C. Chlorine and iodine are gases
• D. Chlorine is solid and iodine is liquid

Which of the following reactions is common to all hydrocarbones?

• A. Combustion
• B. Addition
• C. Polymerization
• D. Condensation

Which of the following compounds is formed by the oxidation of ethanol?

• A. C2H4CO2H
• B. C2H5CO2H
• C. CH3OH
• D. CH3CO2H

The separation of petroleum fractions depends on the differences in their

• A. boiling points
• B. molar masses
• C. melting point
• D. solubilities

consider the reaction represented by the following equation: 2SO2 + O2 ⇌ 2SO3 A decrease in the pressure of the reaction would

• A. decrease in the concentration of SO2
• B. have no effect on the reaction
• C. shift the equilibrium position to the left
• D. shift the equilibrium position to the right

(a) Determine the oxidation number of manganese in MnO\(_4\)

(b)(i) List two metals that are extracted from their ores by electrolysis

(ii) Give one difference between a conductor and an electrolyte.