MCQOPTIONS
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MCQOPTIONS
This section includes 10 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. |
The mol method is considered to be less convenient and difficult than the stoichiometric weight relationship for calculating the combustion of carbon. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
How much percentile of excess air is used, if the theoretical amount of air is 95 kg and the actual amount of air present is 100 kg? |
| A. | 5.26 |
| B. | 5 |
| C. | 10.26 |
| D. | 10 |
| Answer» B. 5 | |
| 3. |
What is the formulae used for calculating the theoretical amount of weight of air required for combustion? |
| A. | Air required = 100/21[(32/12) C + 8 (H O/8) + S] kg |
| B. | Air required = 100/23[(32/12) C + 8 (H O/8) + S] kg |
| C. | Air required = 100/23[(32/12) C 8 (H O/8) + S] kg |
| D. | Air required = 100/21[(32/12) C 8 (H O/8) + S] kg |
| Answer» C. Air required = 100/23[(32/12) C 8 (H O/8) + S] kg | |
| 4. |
Which part of hydrogen does not under goes combustion? |
| A. | H<sub>2</sub> |
| B. | OH<sup> </sup> |
| C. | H<sub>2</sub>O |
| D. | H<sub>2</sub> |
| Answer» D. H<sub>2</sub> | |
| 5. |
How many moles of CO2 are present in the following reaction if 75 kg of carbon is used?
|
| A. | 6.25 |
| B. | 7.25 |
| C. | 5.25 |
| D. | 8.25 |
| Answer» B. 7.25 | |
| 6. |
Which product is obtained after irregular combustion of a substance? |
| A. | O<sub>2</sub> |
| B. | CO |
| C. | CH<sub>4</sub> |
| D. | CO and O<sub>2</sub> |
| Answer» E. | |
| 7. |
What is the formulae to calculate the minimum amount of oxygen required for combustion? |
| A. | Minimum O<sub>2</sub> required = theoretical O<sub>2</sub> required + O<sub>2</sub> present in fuel |
| B. | Minimum O<sub>2</sub> required = O<sub>2</sub> present in fuel |
| C. | Minimum O<sub>2</sub> required = theoretical O<sub>2</sub> required O<sub>2</sub> present in fuel |
| D. | Minimum O<sub>2</sub> required = O<sub>2</sub> present in fuel theoretical O<sub>2</sub> required |
| Answer» D. Minimum O<sub>2</sub> required = O<sub>2</sub> present in fuel theoretical O<sub>2</sub> required | |
| 8. |
What is the mean molecular weight of air? |
| A. | 28.95 |
| B. | 26.4 |
| C. | 30.98 |
| D. | 24.65 |
| Answer» B. 26.4 | |
| 9. |
What is density of air at normal temperature pressure condition? |
| A. | 998.2 kg/m<sup>3</sup> |
| B. | 1.290 kg/m<sup>3</sup> |
| C. | 1290 kg/m<sup>3</sup> |
| D. | 9.982 kg/m<sup>3</sup> |
| Answer» C. 1290 kg/m<sup>3</sup> | |
| 10. |
How many moles of sulphur are present in 100gm of sulphur di oxide? If the reaction is as follows.
|
| A. | 2 |
| B. | 3.6725 |
| C. | 6.25 |
| D. | 1.5625 |
| Answer» E. | |