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A solid-oxide fuel cell is fed with carbon monoxide and reacts with air to produce CO2. This reaction will produce 2 electrons which are used to power an electric circuit external to the fuel cell. The reaction equation is shown below: 2CO(g) + O2(g) -> 2CO2(g) ΔHr° = -565.96 kJ/mol This reaction does not occur for other types of fuel cells which use a catalyst, such as polymerelectrolyte membrane or phosphoric-acid fuel cells. The presence of carbon monoxide on the anode side of these types of fuel cells will cause catalyst poisoning, reducing the efficiency and voltage of the fuel cell. Determine the rate of enthalpy change for a carbon dioxide production rate of 208 mol/hr. The extent of the reaction occurring in the fuel cell can be obtained by the following equation: where:
In the following question, one statement is given, followed by two conclusions I and II. You have to consider the statements to be true, even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any follow from the given statement. Statement: People generally prefer driving their own vehicles over public transportation to go for work which leads to increase in pollution. People should use public transportation or atleast use carpooling if they care to bring down pollution levels.  Conclusion I: Using Public transportation or carpooling will bring down the rising pollution levels.  Conclusion II: People who use personal vehicles instead of public transportation are rich. 
The pie chart given below shows the fuel consumption by five vehicles V1, V2, V3, V4 and V5. In a month total fuel consumption by all five vehicles is 720 litre. Fuel consumption of a particular vehicle is shown in terms of degree with respect to the total fuel consumption by all these five vehicles. J1 = Difference between the fuel consumption of V4 and V5. J2 = Difference between the fuel consumption of V1 and V2. What is the value of J2 – J1?
With reference to 'fuel cells' in which hydrogen-rich fuel and oxygen are used to generate electricity, consider the following statements: 1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by-products. 2. Fuel cells can be used for powering buildings and not for small devices like laptop computers. 3. Fuel cells produce electricity in the form of Alternating Current (AC) Which of the statements given above is/are correct?
With reference to 'fuel cells' in which hydrogen rich fuel and oxygen are used to generate electricity. Consider the following statements.
1. If pure hydrogen is used as a fuel, the fuel cell emits heat and water as by products.
2. Fuel cells can be used for powering buildings and not for small devices like laptop, computers.
3. Fuel cells produce electricity in the form of Alternating Current (AC).
Which of the statements given above is/are correct?
Given below is a statement followed by some conclusions. You have to take the given statement to be true even if it seems to be at variance with the commonly known facts and then decide which of the given conclusions logically follow(s) from the given statement. Statement: In some tier 2 cities in India, transportation is one of the major problems. Conclusions: I. All tier 2 cities are not well connected. II. Lack of transportation facilities is the only problem in Indian metros.
Given below is a statement followed by some conclusions. You have to take the given statement to be true even if it seems to be at variance with the commonly known facts and then decide which of the given conclusion logically follow(s) from the given statement. Statement : In some tier 2 cities in India, transportation is one of the major problems. Conclusions : I. All tier 2 cities are not well connected. II. Lack of transportation facilities is the only problem in Indian metros.
Consider the following statements with reference to fuel cells: 1. In fuel cells, hydrogen-rich fuel and oxygen are used to generate electricity. 2. Fuel cells produce electricity in the form of direct current (DC). 3. Hydrogen fuel cells are more energy-efficient compared to diesel engines. Which of the statements given above is/are correct?
What is minimum amount of air required per m3 of gaseous fuel for complete combustion? m3/m3 of fuel b) 1/100 m3/m3 of fuel c) 1/21 m3/m3 of fuel d) 1/100 m3/m3 of fuel
Determine the corrections or otherwise of the following Assertion and reason : Assertion : Total fuel volume of aircraft is divided into mission or used fuel, reserve fuel and trapped fuel. Reason: Depending on type of aircraft, fuel fraction for each category will be different. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true