MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following cannot be an empirical formula? |
| A. | NH<sub>3</sub> |
| B. | C<sub>5</sub>H<sub>10</sub> |
| C. | H<sub>2</sub>O |
| D. | NaCl |
| Answer» C. H<sub>2</sub>O | |
| 2. |
Which of the following is true regarding molecular formula? |
| A. | actual whole numbered ratio |
| B. | rational numbered ratio |
| C. | simplest possible whole numbered ratio |
| D. | the same as the empirical ratio |
| Answer» B. rational numbered ratio | |
| 3. |
In glucose simplest ratio between C, H and O is ________ |
| A. | 6:12:6 |
| B. | 3:4:3 |
| C. | 1:2:1 |
| D. | 2:3:2 |
| Answer» D. 2:3:2 | |
| 4. |
Which of the following cannot be a molecular formula for an empirical formula HO? |
| A. | H<sub>2</sub>O |
| B. | H<sub>2</sub>O<sub>2</sub> |
| C. | HO |
| D. | HO<sub>2</sub> |
| Answer» C. HO | |
| 5. |
A compound consists of 52.17% of carbon, 13.04% of hydrogen and 34.78% of oxygen. Find the molecular formula if the given molecular weight of the compound is 46g. |
| A. | C<sub>2</sub>H<sub>5</sub>OH |
| B. | C<sub>2</sub>H<sub>6</sub> |
| C. | C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> |
| D. | CH<sub>2</sub>O |
| Answer» B. C<sub>2</sub>H<sub>6</sub> | |
| 6. |
The molecular formula of a compound is C6H12O6. What s the empirical formula for this compound? |
| A. | C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> |
| B. | CHO |
| C. | C<sub>2</sub>H<sub>6</sub>O<sub>2</sub> |
| D. | CH<sub>2</sub>O |
| Answer» E. | |
| 7. |
Which of the following is an empirical formula? |
| A. | C<sub>6</sub>H<sub>12</sub>O<sub>6</sub> |
| B. | H<sub>2</sub>O<sub>2</sub> |
| C. | CH<sub>4</sub> |
| D. | C<sub>2</sub>H<sub>6</sub> |
| Answer» D. C<sub>2</sub>H<sub>6</sub> | |
| 8. |
__________ formula can be calculated if the molar mass is known after having an empirical formula. |
| A. | Molecular |
| B. | Empirical |
| C. | Simpler |
| D. | Shorter |
| Answer» B. Empirical | |
| 9. |
Even without knowing the mass percent of each element, we can calculate the empirical formula. |
| A. | True |
| B. | False |
| Answer» C. | |
| 10. |
A _______ formula represents a whole number ratio to the simplest form. |
| A. | Molecular |
| B. | Empirical |
| C. | Simpler |
| D. | Shorter |
| Answer» C. Simpler | |