MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not true of steam distillation? |
| A. | Very long extraction times |
| B. | High energy consumption |
| C. | No need for subsequent separation steps |
| D. | Very short extraction times |
| Answer» E. | |
| 2. |
What are variants of the steam distillation process? |
| A. | Dry steam distillation |
| B. | Hydro-distillation |
| C. | Direct steam distillation |
| D. | Dry steam distillation, direct steam distillation and hydro-distillation |
| Answer» E. | |
| 3. |
What is still in distillation terminology? |
| A. | It is the apparatus to be used for distillation |
| B. | It is the liquid that is collected in collection flask |
| C. | It is the end product obtained in distillation |
| D. | It is the liquid injected during distillation process |
| Answer» B. It is the liquid that is collected in collection flask | |
| 4. |
How long is steam distillation takes place for lavender? |
| A. | 2 hours |
| B. | 3 hours |
| C. | 4 hours |
| D. | 5 hours |
| Answer» B. 3 hours | |
| 5. |
How to extract oil from cinnamon? |
| A. | Steam distillation |
| B. | Hydro distillation |
| C. | Fractional distillation |
| D. | Boiling |
| Answer» B. Hydro distillation | |
| 6. |
Which of the following statements about steam distillation are correct?Statement 1: It cannot be applied under low pressure.Statement 2: Used in isolation of organic compounds. |
| A. | True, False |
| B. | True, True |
| C. | False, True |
| D. | False, False |
| Answer» B. True, True | |
| 7. |
Is steam distillation used to isolate limonene? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Who invented steam distillation? |
| A. | Avicenna |
| B. | Charles Chamberland |
| C. | Nicolas Appert |
| D. | Clarence Birdseye |
| Answer» B. Charles Chamberland | |
| 9. |
What is the advantage of steam distillation? |
| A. | Reduces decomposition of temperature-sensitive compounds |
| B. | Reduces decomposition of inorganic compounds |
| C. | Increases the decomposition of temperature-sensitive compounds |
| D. | Increases the decomposition of inorganic compounds |
| Answer» B. Reduces decomposition of inorganic compounds | |
| 10. |
What are the applications of steam distillation? |
| A. | Extract the inorganic compounds |
| B. | To clean the equipment |
| C. | Extract and isolate essential oils |
| D. | To purify drinking water |
| Answer» D. To purify drinking water | |
| 11. |
Aniline is separated from aniline-water mixture using ____________ |
| A. | Fractional distillation |
| B. | Fractional crystallisation |
| C. | Steam distillation |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 12. |
The pure solvent after the differential extraction cannot be used again for the extraction. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
The organic compound in differential extraction is recovered from the organic solvent by ____________ |
| A. | Distillation |
| B. | Fractional crystallisation |
| C. | Steam crystallisation |
| D. | Sublimation |
| Answer» B. Fractional crystallisation | |
| 14. |
When does the organic compound be present in the upper solvent layer in differential extraction? |
| A. | Before the extraction |
| B. | During the extraction |
| C. | After the extraction |
| D. | It is always present in the upper layer |
| Answer» D. It is always present in the upper layer | |
| 15. |
Steam distillation process is used to separate substances which are ____________ |
| A. | Steam volatile |
| B. | Steam volatile and immiscible with water |
| C. | Steam volatile and miscible with water |
| D. | All of the mentioned |
| Answer» C. Steam volatile and miscible with water | |
| 16. |
The organic liquid in steam distillation vaporizes at ____________ |
| A. | Lower temperature than its boiling point |
| B. | Higher temperature than its boiling point |
| C. | At its boiling point |
| D. | None of the mentioned |
| Answer» B. Higher temperature than its boiling point | |
| 17. |
In steam distillation, the liquid boils when the sum of vapour pressure due to organic liquid and due to water becomes ____________ |
| A. | Greater than atmospheric pressure |
| B. | Lesser than atmospheric pressure |
| C. | Equals to atmospheric pressure |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 18. |
THE_PURE_SOLVENT_AFTER_THE_DIFFERENTIAL_EXTRACTION_CANNOT_BE_USED_AGAIN_FOR_THE_EXTRACTION.?$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 19. |
Aniline_is_separated_from_aniline-water_mixture_using$ |
| A. | Fractional distillation |
| B. | Fractional crystallisation |
| C. | Steam distillation |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 20. |
The organic compound in differential extraction is recovered from the organic solvent b? |
| A. | Distillation |
| B. | Fractional crystallisation |
| C. | Steam crystallisation |
| D. | Sublimation |
| Answer» B. Fractional crystallisation | |
| 21. |
When does the organic compound is present in the upper solvent layer in differential extraction? |
| A. | Before the extraction |
| B. | During the extraction |
| C. | After the extraction |
| D. | It is always present in the upper layer |
| Answer» D. It is always present in the upper layer | |
| 22. |
Which of the following is the upper layer in differential extraction? |
| A. | Solvent layer |
| B. | Solute layer |
| C. | Aqueous layer |
| D. | None of the mentioned |
| Answer» B. Solute layer | |
| 23. |
Which of the following property is not possessed by the organic solvent required to separate organic compound with water? |
| A. | It is immiscible with water |
| B. | It is less volatile than water |
| C. | It is easily vaporisable |
| D. | Organic compound is more soluble in it |
| Answer» C. It is easily vaporisable | |
| 24. |
What type of mixture is collected in round bottom flask after passing through a steam generator? |
| A. | Mixture of volatile organic compound and water |
| B. | Mixture of nonvolatile organic compound and water |
| C. | Mixture of nonvolatile inorganic compound and steam |
| D. | Mixture of volatile organic compound and steam |
| Answer» E. | |
| 25. |
Steam distillation process is used to separate substances which are |
| A. | Steam volatile |
| B. | Steam volatile and immiscible with water |
| C. | Steam volatile and miscible with water |
| D. | All of the mentioned |
| Answer» C. Steam volatile and miscible with water | |
| 26. |
The organic liquid in steam distillation vaporizes at |
| A. | Lower temperature than its boiling point |
| B. | Higher temperature than its boiling point |
| C. | At its boiling point |
| D. | None of the mentioned |
| Answer» B. Higher temperature than its boiling point | |
| 27. |
In steam distillation, the liquid boils when the sum of vapour pressure due to organic liquid and due to water becomes |
| A. | Greater than atmospheric pressure |
| B. | Lesser than atmospheric pressure |
| C. | Equals to atmospheric pressure |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |