MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Industry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Gas under high equivalent temperature gas systems is termed as ________________ |
| A. | Compressed gas |
| B. | Dissolved gas |
| C. | Liquefied gas |
| D. | Plasma |
| Answer» E. | |
| 2. |
Which of the following reaction takes place at cathode in high temperature fuel cell using coal? |
| A. | \(\frac{1}{2}\) O2+ CO2+ 2e– →CO3-2 |
| B. | C+2CO3-2 →3CO2+ 4e– |
| C. | CO+CO3-2 →2CO2+ 2e– |
| D. | H2+ CO3-2 → H2 O+CO2+ 2e– |
| Answer» B. C+2CO3-2 →3CO2+ 4e– | |
| 3. |
Which electrolyte is used in a high-temperature fuel cell using coal? |
| A. | MgCO3 |
| B. | Fused K2CO3 |
| C. | CaCO3 |
| D. | Fused Na2CO3 |
| Answer» C. CaCO3 | |
| 4. |
Which of the following statement is true regarding efficiencies of fuel cell? |
| A. | ƞ0 = ƞr |
| B. | ƞ0 > ƞr |
| C. | ƞ0 < ƞr |
| D. | ƞ0 ≤ ƞr |
| Answer» D. ƞ0 ≤ ƞr | |
| 5. |
What is the overall efficiency of a fuel cell? (E=Delivered voltage, I=current delivered for a period of time T) |
| A. | \(\frac{(EIT)}{∆H} \) |
| B. | \(\frac{(ET)}{∆HI} \) |
| C. | \(1-(\frac{(EIT)}{∆H}) \) |
| D. | \(\frac{∆H}{EIT} \) |
| Answer» B. \(\frac{(ET)}{∆HI} \) | |
| 6. |
What is the efficiency of Carnot cycle (where T1 is source temperature and T2 is sink temperature)? |
| A. | \(\frac{(T_1-T_2)}{T_2} \) |
| B. | \(\frac{(T_2-T_1)}{T_1} \) |
| C. | \(\frac{(T_1-T_2)}{T_1} \) |
| D. | \(\frac{(T_2-T_1)}{T_2} \) |
| E. | ?a) \(\frac{(T_1-T_2)}{T_2} \) b) \(\frac{(T_2-T_1)}{T_1} \) c) \(\frac{(T_1-T_2)}{T_1} \) d) \(\frac{(T_2-T_1)}{T_2} \) |
| Answer» B. \(\frac{(T_2-T_1)}{T_1} \) | |
| 7. |
The reversible efficiency of a fuel cell is given by _________________ |
| A. | \(\frac{∆G}{∆H} \) |
| B. | \(\frac{∆H}{∆G} \) |
| C. | \(1-\frac{T∆S}{∆G} \) |
| D. | \(1-\frac{T∆G}{∆H} \) |
| Answer» B. \(\frac{∆H}{∆G} \) | |
| 8. |
Which of the following reaction takes place at anode in hydrogen-oxygen fuel cell? |
| A. | \(H_2+\frac{1}{2} O_2 \rightarrow H_2 O\) |
| B. | \(H_2 O \rightarrow H_2+ O_2\) |
| C. | \(H_2+2OH^-\rightarrow 2H_2 O+ 2e^-\) |
| D. | \(O_2+H_2 O+ 2e^-\rightarrow HO_2^-+ OH^-\) |
| Answer» D. \(O_2+H_2 O+ 2e^-\rightarrow HO_2^-+ OH^-\) | |