MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Calculate the molecular mass of sucrose(C12H22O11) molecule? |
| A. | 342 amu |
| B. | 343 amu |
| C. | 341 amu |
| D. | 340 amu |
| Answer» B. 343 amu | |
| 2. |
What s the formula mass of NaCl? |
| A. | 23 u |
| B. | 35.5 u |
| C. | 58 u |
| D. | 58.5 u |
| Answer» E. | |
| 3. |
What s the molecular mass of carbon dioxide? |
| A. | 43 |
| B. | 28 |
| C. | 44 |
| D. | 40 |
| Answer» D. 40 | |
| 4. |
______ is the sum of atomic masses of the elements present in a molecule. |
| A. | Average atomic mass |
| B. | Atomic mass |
| C. | Gram formula mass |
| D. | Molecular mass |
| Answer» E. | |
| 5. |
A sample of carbon that contains 70% carbon-12 and 30% carbon-14. What do you think is the average atomic mass of this sample? |
| A. | 14.5 |
| B. | 14.14 |
| C. | 14 |
| D. | 12 |
| Answer» D. 12 | |
| 6. |
Nowadays, amu is replaced by ____ |
| A. | u |
| B. | g |
| C. | kg |
| D. | am |
| Answer» B. g | |
| 7. |
What is the abbreviation of amu? |
| A. | Atomic matter unit |
| B. | Atomic mass unified |
| C. | Atomic mass unit |
| D. | At mass unity |
| Answer» D. At mass unity | |
| 8. |
What is the mass of hydrogen in terms of amu? |
| A. | 1.0020 amu |
| B. | 1.0180 amu |
| C. | 1.0070 amu |
| D. | 1.0080 amu |
| Answer» E. | |
| 9. |
As, per the current system, carbon-12 has been taken as the standard for measuring atomic masses. |
| A. | True |
| B. | False |
| Answer» B. False | |