MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
Determine the water equivalent of the bomb calorimeter apparatus which gave following data during experiment: Weight of benzoic acid taken = 2.12 gm, Weight of water taken in calorimeter = 2.5kg, Initial temperature= 16.970, Final temperature = 18.650, Cooling correction = 0.035 0C, fuse wire correction = 20 calories and cotton thread correction = 2.2 calories? (Calorific value of benzoic acid=6324) |
| A. | 7253.22 gm |
| B. | 8366.50 gm |
| C. | 7830.36 gm |
| D. | 5330.36 gm |
| Answer» E. | |
| 2. |
The correct cotton thread used for firing the charge is calculated from the weight of wet cotton thread. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Which of the following correction are obtained in the largest amount in bomb calorimeter? |
| A. | Fuse wire correction |
| B. | Acid correction |
| C. | Cotton thread correction |
| D. | Cooling correction |
| Answer» C. Cotton thread correction | |
| 4. |
In a bomb calorimeter experiment, following data was obtained: x = 0.85gm, W = 2.5kg, w = .5kg, observed rise in temperature = 2.25 0C, tA = 38.6 calories, tF = 6.8 calories, tT = 1.9 calories and tC = 0.05 0C. Calculate net calorific value if the coal contains 10 % hydrogen? |
| A. | 7533.7 cal/gm |
| B. | 5704.655 cal/gm |
| C. | 8062 cal/gm |
| D. | 8.062 cal/gm |
| Answer» B. 5704.655 cal/gm | |
| 5. |
For which of the following correction we should use a larger sample mass? |
| A. | Fuse wire correction |
| B. | Cotton thread correction |
| C. | Cooling correction |
| D. | Acid correction |
| Answer» C. Cooling correction | |
| 6. |
How is the heat liberated in fuse wire correction? |
| A. | By the breakage of fuse wire |
| B. | Due to the material of fuse wire |
| C. | Due to the ignition of fuse wire |
| D. | Due to the length of fuse wire |
| Answer» D. Due to the length of fuse wire | |
| 7. |
On what basis does the acid correction is measured in bomb calorimeter? |
| A. | Gases present in the bomb |
| B. | Due to formation of the compound after adding water in the bomb |
| C. | Due to the presence of excess oxygen |
| D. | Due to the material of the bomb |
| Answer» C. Due to the presence of excess oxygen | |
| 8. |
Which of the following correction of bomb calorimeter is added to the observed raise in temperature? |
| A. | Acid correction |
| B. | Fuse wire correction |
| C. | Cotton thread correction |
| D. | Cooling correction |
| Answer» E. | |
| 9. |
To calculate the calorific value of coal using bomb s calorimeter, which of the following compound are formed after the bomb is removed from the calorimeter? |
| A. | H<sub>2</sub>S and CO<sub>2</sub> |
| B. | H<sub>2</sub>SO<sub>4</sub> and HNO<sub>3</sub> |
| C. | H<sub>2</sub>SO<sub>4</sub> and NO<sub>2</sub> |
| D. | SO<sub>2</sub> and HNO<sub>3</sub> |
| Answer» C. H<sub>2</sub>SO<sub>4</sub> and NO<sub>2</sub> | |