Jamb Chemistry Questions
Question 6:
Fe\(_2\)O\(_{3(s)}\) + 2Al\(_{(s)}\) → Al\(_2\)O\(_3\) + 2Fe\(_{(s)}\). If the heats of formation of Al\(_2\)O\(_3\) and Fe\(_2\)O\(_3\) are - 1670 kJmol\(^{-1}\) and - 822 kJmol\(^{-1}\) respectively, the enthalpy change in kJ for the reaction is ?
View Answer & ExplanationQuestion 7:
Iron galvanized with zinc is cathodically protected from corrosion. This is because?
View Answer & ExplanationQuestion 8:
Which of the following samples will react fastest with dilute trioxonitrate (V) acid?
View Answer & ExplanationQuestion 9:
In the reaction:
2Hl(g) ↔ H2(g) + l2(g)' ΔH = 10 kj;
The concentration of iodine in the equilibrium mixture can be increased by?
View Answer & Explanation2Hl(g) ↔ H2(g) + l2(g)' ΔH = 10 kj;
The concentration of iodine in the equilibrium mixture can be increased by?
Question 10:
Which of the following gases can be collected by the upward displacement of air?
View Answer & Explanation