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. |
There were 15 moles of a substance present initially in a system, 25 moles were added to it and a reaction occurred so that its moles are reduced by 50%, what are the final moles of a substance in the system? |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 40View answer |
| Answer» D. 40View answer | |
| 2. |
There were 10 moles of a substance present initially in a system, 5 moles were added to it and a reaction occurred so that its moles are reduced by 20%, what are the final moles of a substance in the system? |
| A. | 10 |
| B. | 12 |
| C. | 15 |
| D. | 18View answer |
| Answer» C. 15 | |
| 3. |
10 moles of A were present in a system initially, and 10 moles of C are added to it, it follows the reaction 2A + C -> 5B, what is the number of moles of B produced? |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 50View answer |
| Answer» D. 50View answer | |
| 4. |
A reaction has reactants 2 moles of NaOH and 1 mole of H2SO4, and products Na2SO4 and H2O, what are the total moles of products? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4View answer |
| Answer» D. 4View answer | |
| 5. |
In a random reaction 2 mole of CH4 and 1 mole of C2H4 are reacted, and 1 mole of C3H8 and 1 mole of CxHy are produced, what is x*y? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 12View answer |
| Answer» C. 8 | |
| 6. |
A combustion reaction has reactants 1 mole of CxHy and 2 moles of O2 and products 1 mole of CO2 and 2 mole of H2O, what is x + y? |
| A. | 1 |
| B. | 3 |
| C. | 4 |
| D. | 5View answer |
| Answer» E. | |
| 7. |
10 moles of O2 is added to 10 moles of H2, how many moles of H2O will it produce? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20View answer |
| Answer» C. 15 | |
| 8. |
10_MOLES_OF_A_WERE_PRESENT_IN_A_SYSTEM_INITIALLY,_AND_10_MOLES_OF_C_ARE_ADDED_TO_IT,_IT_FOLLOWS_THE_REACTION_2A_+_C_->_5B,_WHAT_IS_THE_NUMBER_OF_MOLES_OF_B_PRODUCED??$ |
| A. | 5 |
| B. | 10 |
| C. | 25 |
| D. | 50 |
| Answer» D. 50 | |
| 9. |
There were 15 moles of a substance present initially in a system, 25 moles were added to it and a reaction occurred so that its moles are reduced by 50%, what are the final moles of a substance in the system?$ |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 40 |
| Answer» D. 40 | |
| 10. |
There were 10 moles of a substance present initially in a system, 5 moles were added to it and a reaction occurred so that its moles are reduced by 20%, what are the final moles of a substance in the system?$ |
| A. | 10 |
| B. | 12 |
| C. | 15 |
| D. | 18 |
| Answer» C. 15 | |
| 11. |
8 moles of A were present in a system initially, and 24 moles of B are added to it, it undergoes the reaction 2A + 3B -> 4C + 5D, what are the number of moles of D produced? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» D. 40 | |
| 12. |
10 moles of A were present in a system initially, and 8 moles of C are added to it, it undergoes the reaction 5A + 3C -> 4B, what are number of moles of B produced? |
| A. | 4 |
| B. | 6 |
| C. | 8 |
| D. | 10 |
| Answer» D. 10 | |
| 13. |
10 moles of A were present in a system initially, and 12 moles of C are added to it, it undergoes the reaction 2A + 3C -> 2B, what are number of moles of B produced? |
| A. | 4 |
| B. | 5 |
| C. | 8 |
| D. | 12 |
| Answer» D. 12 | |
| 14. |
10 moles of A were present in a system initially, and 10 moles are added to it, it follows the reaction 4A -> B, what are the number of moles of B produced? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» B. 10 | |
| 15. |
A reaction is A + 2B -> 3C, if 2 moles of A and 4 moles of B entered the system, what are the number of moles of C formed? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 16. |
A reaction has reactants 2 moles of NaOH and 1 mole of H2SO4, and products Na2SO4 and H2O, what are the total moles of products? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 17. |
In a random reaction 2 mole of CH4 and 1 mole of C2H4 are reacted, and 1 mole of C3H8 and 1 mole of CxHy are produced, what is x*y? |
| A. | 2 |
| B. | 4 |
| C. | 8 |
| D. | 12 |
| Answer» C. 8 | |
| 18. |
A combustion reaction has reactants 1 mole of CxHy and 2 moles of O2 and products 1 mole of CO2 and 2 mole of H2O, what is x + y? |
| A. | 1 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» E. | |
| 19. |
10 moles of O2 is added to 10 moles of H2, how many moles of H2O will it produce? |
| A. | 5 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 20. |
A container has 10 grams of water 5 grams of water is added and 2 grams of water is taken out, what is the final amount of water? |
| A. | 7 grams |
| B. | 10 grams |
| C. | 13 grams |
| D. | 15 grams |
| Answer» D. 15 grams | |
| 21. |
The equation of material balance, (Final condition + Sum of outputs) is equal to which of the following? |
| A. | Initial condition – Sum of inputs |
| B. | Initial condition + Sum of inputs |
| C. | Sum of inputs – Initial condition |
| D. | None of the mentioned |
| Answer» C. Sum of inputs ‚Äö√Ñ√∂‚àö√ë‚àö¬® Initial condition | |
| 22. |
Which of the following does the concept of material balance based upon? |
| A. | Conservation of mass |
| B. | Conservation of energy |
| C. | Conservation of momentum |
| D. | Conservation of Volume |
| Answer» B. Conservation of energy | |