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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? Correct Answer 1 only

The correct answer is 1 only.

  • If pure hydrogen is used as a fuel, fuel cells emit only heat and water as byproducts. Hence statement 1 is correct.
  • Fuel cells could power our cars, with hydrogen replacing petroleum fuels.

Mistake Points

  • Fuel cells can power almost any portable device or machine that uses batteries. Laptop computers, cellular phones, and hearing aids could be powered by portable fuel cells. Hence statement 2 is incorrect.
  • Hydrogen-powered fuel cells are more energy-efficient than traditional combustion technologies.
  • Fuel cells produce electricity in the form of direct current (DC). Hence statement 3 is incorrect.

Related Questions

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?
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?
Consider the following statements regarding hydrogen fuel cell. 1. Fuel cell electric vehicles (FCEV) uses hydrogen, and an oxidant to create electricity by an electrochemical process. 2. Like a battery-electricity vehicle, fuel cell electric vehicles (FCEV) can also store energy. 3. Hydrogen fuel cells produce much smaller quantities of greenhouse gases. Which of the statements given above is/are correct?
Which of the following statements about desktop and laptop computers areTRUE? A. Most modern laptop computers have built-in webcams B. Desktop computers are not very portable C. All desktop computers have built-in touchpad D. Laptop computers are rarely supplied with a mouse Choose the correct answer from the options given below:
In the following question, four statements are given followed by four conclusions I, II, III and IV. You have to consider the given statements to be true even, if they seem to be at variance with commonly known facts. Read all the conclusions and decide which of the following logically follows from the given statements disregarding the commonly known facts. Statements: Some Mobile are Laptop. Some Tablet are Laptop. Some Desktop are Tablet. No Desktop is Mobile. Conclusions: I. All Tablet being Mobile is a possibility. II. All Laptop being Mobile is a possibility. III. All Desktop are Laptop. IV. All Tablet are Laptop.
With reference to technologies for solar power production, consider the following statements: 1. 'Photovoltaics' is a technology that generates electricity by direct conversion of light into electricity, while 'Solar Thermal' is a technology that utilizes the Sun's rays to generate heat which is further used in the electricity generation process. 2. Photovoltaics generates Alternating Current (AC), while Solar Thermal generates Direct Current (DC). 3. India has a manufacturing base for Solar Thermal technology, but not for Photovoltaics. Which of the statements given above is/are correct?
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:
With reference to the Green Hydrogen, consider the following statements: 1. Green hydrogen is produced with the help of electrolysis through electricity generated from renewable sources of energy such as solar and wind. 2. An electric current then splits the water into hydrogen and oxygen. 3. This ensures no greenhouse gas emissions as the only by-product of this process is oxygen, making it a great replacement for carbon-emitting fuels. Which of the above statement is/are correct?
You have your laptop directly connected into a router's Ethernet port. Which of the following are among the requirements for the copy flash tftp command to be successful?
1. TFTP server software must be running on the router.
2. TFTP server software must be running on your laptop.
3. The Ethernet cable connecting the laptop directly into the router's Ethernet port must be a straight-through cable.
4. The laptop must be on the same subnet as the router's Ethernet interface.
5. The copy flash tftp command must be supplied the IP address of the laptop.
With reference to the Waste-to-energy, consider the following statements: 1. It converts municipal and industrial solid waste into electricity and/or heat for industrial processing. 2. It is a form of energy recovery. 3. Most Waste-to-energy processes produce electricity and/or heat directly through combustion, or produce a combustible fuel commodity, such as methane, methanol, ethanol or synthetic fuels. Which of the above statement is/are correct?