How many of the given statements are true for fuel cell?
A. It is a type of Galvanic cell
B. It is used for providing electrical power in space programmes.
c. Hydrogen and oxygen are bubbled through porous carbon electrodes into concentrated NaOH solution
D. It produces electricity with an efficiency of 40%
E. It is pollution free cell

Question

The elements of the 3d transition series are given as: Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn. Answer the following:

Copper has an exceptionally positive \( E^\circ_{\text{M}^{2+}/\text{M}} \) value, why?

Answer 1

To determine which statements are true for a fuel cell, let's analyze each option one by one:

Statement A: It is a type of Galvanic cell
A fuel cell is indeed a type of Galvanic cell because it generates electrical energy from chemical reactions, specifically from the oxidation of hydrogen. This statement is true.
Statement B: It is used for providing electrical power in space programmes
Fuel cells have been widely used in space programs to provide power, particularly because they can produce electricity and water as byproducts from hydrogen and oxygen – both critical resources in space missions. This statement is true.
Statement C: Hydrogen and oxygen are bubbled through porous carbon electrodes into concentrated NaOH solution
This statement describes a common setup in fuel cells, where hydrogen and oxygen gases are passed through electrodes often situated in an electrolyte solution or medium. Concentrated NaOH (a strong alkaline solution) can be used in some alkaline fuel cells. Thus, this statement is also true.
Statement D: It produces electricity with an efficiency of 40%
Typically, fuel cells can achieve efficiencies higher than 40%, often ranging between 40-60% under normal conditions, and up to 85% with heat capture (cogeneration). However, the specified "40%" in the statement could be misrepresented or contextually misunderstood without proper specifics. Hence, this statement is treated with skepticism.
Statement E: It is pollution free cell
Fuel cells are often considered environmentally friendly since they produce water as a byproduct rather than harmful emissions. However, the source of hydrogen (if derived from fossil fuels) might impact the overall environmental footprint. Thus, while often termed "pollution-free," it is conditional and contextual. Therefore, this statement might be simplistic in its phrasing.

After evaluating the statements, it is concluded that statements A, B, and C are true based on general characteristics and typical applications of fuel cells.

The correct answer is: A, B, C are true.

Answer 2

To determine which statements are true for a fuel cell, let's analyze each option one by one:

Statement A: It is a type of Galvanic cell
A fuel cell is indeed a type of Galvanic cell because it generates electrical energy from chemical reactions, specifically from the oxidation of hydrogen. This statement is true.
Statement B: It is used for providing electrical power in space programmes
Fuel cells have been widely used in space programs to provide power, particularly because they can produce electricity and water as byproducts from hydrogen and oxygen – both critical resources in space missions. This statement is true.
Statement C: Hydrogen and oxygen are bubbled through porous carbon electrodes into concentrated NaOH solution
This statement describes a common setup in fuel cells, where hydrogen and oxygen gases are passed through electrodes often situated in an electrolyte solution or medium. Concentrated NaOH (a strong alkaline solution) can be used in some alkaline fuel cells. Thus, this statement is also true.
Statement D: It produces electricity with an efficiency of 40%
Typically, fuel cells can achieve efficiencies higher than 40%, often ranging between 40-60% under normal conditions, and up to 85% with heat capture (cogeneration). However, the specified "40%" in the statement could be misrepresented or contextually misunderstood without proper specifics. Hence, this statement is treated with skepticism.
Statement E: It is pollution free cell
Fuel cells are often considered environmentally friendly since they produce water as a byproduct rather than harmful emissions. However, the source of hydrogen (if derived from fossil fuels) might impact the overall environmental footprint. Thus, while often termed "pollution-free," it is conditional and contextual. Therefore, this statement might be simplistic in its phrasing.

After evaluating the statements, it is concluded that statements A, B, and C are true based on general characteristics and typical applications of fuel cells.

The correct answer is: A, B, C are true.

The Correct Option is A

Solution and Explanation

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