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} ) O<sub>2</sub>+ CO<sub>2</sub>+ 2e<sup> </sup> CO<sub>3</sub><sup>-2</sup> |
| B. | C+2CO<sub>3</sub><sup>-2</sup> 3CO<sub>2</sub>+ 4e<sup> </sup> |
| C. | CO+CO<sub>3</sub><sup>-2</sup> 2CO<sub>2</sub>+ 2e<sup> </sup> |
| D. | H<sub>2</sub>+ CO<sub>3</sub><sup>-2</sup> H<sub>2</sub> O+CO<sub>2</sub>+ 2e<sup> </sup> |
| Answer» B. C+2CO<sub>3</sub><sup>-2</sup> 3CO<sub>2</sub>+ 4e<sup> </sup> | |
| 3. |
Which electrolyte is used in a high-temperature fuel cell using coal? |
| A. | MgCO<sub>3</sub> |
| B. | Fused K<sub>2</sub>CO<sub>3</sub> |
| C. | CaCO<sub>3</sub> |
| D. | Fused Na<sub>2</sub>CO<sub>3</sub> |
| Answer» C. CaCO<sub>3</sub> | |
| 4. |
Which of the following statement is true regarding efficiencies of fuel cell? |
| A. | <sub>0</sub> = <sub>r</sub> |
| B. | <sub>0</sub> > <sub>r</sub> |
| C. | <sub>0</sub> < <sub>r</sub> |
| D. | <sub>0</sub> <sub>r</sub> |
| Answer» D. <sub>0</sub> <sub>r</sub> | |
| 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} ) |
| 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^- ) | |