| Find the correct answer by clicking on the choice given. 1. The pH of a 1 molar solution of a weak acid with a Ka = 10-10 will be... | ||
| (a) | 2.5 | |
| (b) | 5 | |
| (c) | 10 | |
| (d) | Yikes! This question is lowering the pH of my stomach. | |
| 2. What is the oxidation number of chromium in the ionic compound Na2Cr2O7? | ||
| (a) | 2 | |
| (b) | 6 | |
| (c) | 7 | |
| (d) | 12 | |
| 3. Which Brønsted acid (H2O or H2S (aq)) is the stronger acid and why is it the stronger acid? | ||
| (a) | H2O is the stronger acid because oxygen has a greater electronegativity than sulfur, which gives the attached hydrogen atom more proton character. | |
| (b) | H2O is the stronger acid because H2S is a gas and gases are not acids. | |
| (c) | H2S is the stronger acid because the hydrogen-sulfur bond is much weaker than the hydrogen-oxygen bond due to a greater difference in atomic orbital energy levels. | |
| (d) | H2S is the stronger acid because it is a heavier molecule and therefore has more energetic collisions. | |
| 14. Which Brønsted acid (HCl (aq) or H2S (aq)) is the stronger acid and why is it the stronger acid? | ||
| (a) | HCl is the stronger acid because it is a better proton donor. | |
| (b) | HCl is the stronger acid because the hydrogen-chlorine bond is much weaker than the hydrogen-sulfur bond due to a greater difference in atomic orbital energy levels. | |
| (c) | HCl is the stronger acid because chlorine has a greater electronegativity than sulfur, which gives the attached hydrogen atom more proton character. | |
| (d) | H2S is twice as strong an acid as HCl because it has two acidic hydrogen atoms versus only one hydrogen atom in HCl. | |
| 5. What is the oxidation number of nitrogen in the molecule N2? | ||
| (a) | 0 | |
| (b) | 3 | |
| (c) | 5 | |
| (d) | 7 | |
| 6. Which of the following compounds is the strongest Brønsted acid? | ||
| (a) | H2SO4 | |
| (b) | CH3CO2H | |
| (c) | HNO3 | |
| (d) | H3PO4 | |
| 7. Which of the following compounds is the strongest Brønsted base? | ||
| (a) | NaHSO4 | |
| (b) | NaCH3CO2 | |
| (c) | NaNO3 | |
| (d) | NaH2PO4 | |
| 8. Which of the following compounds is the strongest Brønsted base? | ||
| (a) | NaCH3 | |
| (b) | NaOH | |
| (c) | NaF | |
| (d) | NaNH2 | |
| 9. Which of the following compounds is the strongest Brønsted acid? | ||
| (a) | NH3 | |
| (b) | HF | |
| (c) | H2O | |
| (d) | CH4 | |
| 10. Which of the following chemical equations correctly represents the reaction between aluminum and oxygen? | ||
| | ||
Chemistry: MCQ questions on Chemical Reaction
About Kumar
Author Description here.. Nulla sagittis convallis. Curabitur consequat. Quisque metus enim, venenatis fermentum, mollis in, porta et, nibh. Duis vulputate elit in elit. Mauris dictum libero id justo.
0 on: "Chemistry: MCQ questions on Chemical Reaction"