MCQOPTIONS
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MCQOPTIONS
This section includes 22 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A mixture contains 80% of NaOH and 20% H2O by weight, what is the mole fraction of NaOH? |
| A. | 0.24 |
| B. | 0.42 |
| C. | 0.64 |
| D. | 0.78View answer |
| Answer» D. 0.78View answer | |
| 2. |
A mixture contains 80% of HCl and 20% H2O by weight, what is the mole fraction of HCl? |
| A. | 0.15 |
| B. | 0.29 |
| C. | 0.45 |
| D. | 0.66View answer |
| Answer» E. | |
| 3. |
A mixture contains 10 grams each of CH4, H2O, and SO2, what is the mole fraction of CH4? |
| A. | 0.14 |
| B. | 0.31 |
| C. | 0.46 |
| D. | 0.67View answer |
| Answer» D. 0.67View answer | |
| 4. |
A mixture contains 9 gram each of H2O and NaCl, what is the mole fraction of NaCl? |
| A. | 0.15 |
| B. | 0.23 |
| C. | 0.45 |
| D. | 0.64View answer |
| Answer» C. 0.45 | |
| 5. |
A mixture contains 23 g of ethanol and 36 g of water, some acetic acid is added to the mixture and its mole fraction becomes 0.5, how much acetic acid was added? |
| A. | 25 g |
| B. | 75 g |
| C. | 100 g |
| D. | 150 gView answer |
| Answer» E. | |
| 6. |
A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is 10 g, what is the sum of mole fraction of SO2 and O2? |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1View answer |
| Answer» D. 1View answer | |
| 7. |
If the mole fraction of SO2 in H2SO4 is 0.2, what is the ratio of mass of sulfur and oxygen in the solution? |
| A. | 0.166 |
| B. | 6 |
| C. | 1.8 |
| D. | 0.555View answer |
| Answer» E. | |
| 8. |
A_MIXTURE_CONTAINS_23_G_OF_ETHANOL_AND_36_G_OF_WATER,_SOME_ACETIC_ACID_IS_ADDED_TO_THE_MIXTURE_AND_ITS_MOLE_FRACTION_BECOMES_0.5,_HOW_MUCH_ACETIC_ACID_WAS_ADDED??$ |
| A. | 25 g |
| B. | 75 g |
| C. | 100 g |
| D. | 150 g |
| Answer» E. | |
| 9. |
A mixture contains 10 grams each of CH4, H2O, and SO2, what is the mole fraction of CH4?$ |
| A. | 0.14 |
| B. | 0.31 |
| C. | 0.46 |
| D. | 0.67 |
| Answer» D. 0.67 | |
| 10. |
A mixture contains 9 gram each of H2O and NaCl, what is the mole fraction of NaCl?$ |
| A. | 0.15 |
| B. | 0.23 |
| C. | 0.45 |
| D. | 0.64 |
| Answer» C. 0.45 | |
| 11. |
A compound contains 40% of Sulphur and 60% of Oxygen, what is the empirical formula of the compound? |
| A. | SO2 |
| B. | SO3 |
| C. | SO4 |
| D. | None of the mentioned |
| Answer» C. SO4 | |
| 12. |
A mixture contains 80% of NaOH and 20% H2O by weight, what is the mole fraction of NaOH? |
| A. | 0.24 |
| B. | 0.42 |
| C. | 0.64 |
| D. | 0.78 |
| Answer» D. 0.78 | |
| 13. |
A mixture contains 80% of HCl and 20% H2O by weight, what is the mole fraction of HCl? |
| A. | 0.15 |
| B. | 0.29 |
| C. | 0.45 |
| D. | 0.66 |
| Answer» E. | |
| 14. |
A neutral gas that is made of nitrogen and hydrogen only contains 7 g of nitrogen is in a mixture of with total mass 17 g, what is the mass fraction of the gas? |
| A. | 0.5 |
| B. | 0.25 |
| C. | 0.45 |
| D. | 0.8 |
| Answer» B. 0.25 | |
| 15. |
A mixture of gases SO2, O2 and 4 g of N2 and total mass of mixture is 10 g, what is the sum of mole fraction of SO2 and O2? |
| A. | 0.25 |
| B. | 0.5 |
| C. | 0.75 |
| D. | 1 |
| Answer» D. 1 | |
| 16. |
If the mole fraction of SO2 in H2SO4 is 0.2, what is the ratio of mass of sulfur and oxygen in the solution? |
| A. | 0.166 |
| B. | 6 |
| C. | 1.8 |
| D. | 0.555 |
| Answer» E. | |
| 17. |
A solution has 25% w/w solution of Sodium Chloride in 10 grams of water what is the mole fraction of Sodium Chloride? |
| A. | 0.05 |
| B. | 0.06 |
| C. | 0.07 |
| D. | 0.08 |
| Answer» D. 0.08 | |
| 18. |
If the mole fraction of sodium is 0.25 in 9 moles of liquid carbon dioxide, what is the mass fraction of sodium? |
| A. | 0.10 |
| B. | 0.15 |
| C. | 0.20 |
| D. | 0.25 |
| Answer» C. 0.20 | |
| 19. |
What is the mass fraction of 4 moles of Sodium in 8 moles of Hydrogen chloride? |
| A. | 0.24 |
| B. | 0.48 |
| C. | 0.56 |
| D. | 0.72 |
| Answer» B. 0.48 | |
| 20. |
If the mole fraction of 4.5 moles of solute is 0.5, what is the number of moles of solvent? |
| A. | 9 |
| B. | 4.5 |
| C. | 1.5 |
| D. | 3 |
| Answer» C. 1.5 | |
| 21. |
What is the unit of mole fraction? |
| A. | Kg/m<sup>3</sup> |
| B. | N/m<sup>3</sup> |
| C. | m<sup>-2</sup> |
| D. | None of the mentioned |
| Answer» E. | |
| 22. |
What is the mole fraction of sodium with moles n in a solution with moles of solvent N? |
| A. | N/n |
| B. | n/N |
| C. | n/(n + N) |
| D. | N/(n + N) |
| Answer» D. N/(n + N) | |