Fuel cell, using hydrogen and oxygen as fuels,
A. has been used in spaceship
B. has as efficiency of 40% to produce electricity
C. uses aluminium as catalysts
D. is eco-friendly
E. is actually a type of Galvanic cell only
A. has been used in spaceship
B. has as efficiency of 40% to produce electricity
C. uses aluminium as catalysts
D. is eco-friendly
E. is actually a type of Galvanic cell only
- A,B,C only
- A,B,D only
- A,B,D,E only
- A,D,E only
The Correct Option is D
Approach Solution - 1
A fuel cell, specifically using hydrogen and oxygen, has found applications in spaceships due to its capability to provide electricity in a lightweight, efficient form. It does not use aluminum as a catalyst but rather commonly uses platinum or other noble metals. Fuel cells operate in an eco-friendly manner, emitting only water as a by-product. Furthermore, they can be categorized as galvanic cells since they convert chemical energy directly into electrical energy.
Approach Solution -2
A fuel cell is an electrochemical device that directly converts the chemical energy of a fuel (like hydrogen) and an oxidizing agent (like oxygen) into electrical energy, water, and heat. Unlike conventional cells, a fuel cell operates continuously as long as reactants are supplied.
Step 2: Working principle of hydrogen-oxygen fuel cell
In a hydrogen-oxygen fuel cell:
- Hydrogen gas is supplied at the anode, where it gets oxidized:
\[ 2H_2 \rightarrow 4H^+ + 4e^- \] - Oxygen gas is supplied at the cathode, where it gets reduced:
\[ O_2 + 4H^+ + 4e^- \rightarrow 2H_2O \] - The overall reaction is:
\[ 2H_2 + O_2 \rightarrow 2H_2O \] This reaction releases electrical energy and heat, with water being the only byproduct.
Step 3: Evaluate each given statement
A. Has been used in spaceship: Correct. Hydrogen-oxygen fuel cells have been used in space missions (e.g., Apollo program) to supply both electricity and drinking water.
B. Has efficiency of 40% to produce electricity: Incorrect. The hydrogen-oxygen fuel cell has an efficiency of about 60–70%, which is higher than typical thermal power systems (≈40%).
C. Uses aluminium as catalyst: Incorrect. The common catalysts used are platinum or nickel, not aluminium.
D. Is eco-friendly: Correct. The only product is water; no greenhouse gases or pollutants are released, making it environmentally friendly.
E. Is actually a type of Galvanic cell only: Correct. A fuel cell, like a Galvanic cell, produces electricity from spontaneous redox reactions but continuously operates as long as fuel is supplied.
Step 4: Conclusion
Therefore, the correct statements about the hydrogen-oxygen fuel cell are:
Top JEE Main Chemistry Questions
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- At equilibrium the concentrations of and in a sealed vessel at . What will be for the reaction
- Find out the major products from the following reactions
Cobalt chloride when dissolved in water forms pink colored complex $X$ which has octahedral geometry. This solution on treating with cone $HCl$ forms deep blue complex, $\underline{Y}$ which has a $\underline{Z}$ geometry $X, Y$ and $Z$, respectively, are
- The correct order of atomic radii is:
Top JEE Main Electrochemistry Questions
- $\text{The hydrogen electrode is dipped in a solution of pH = 3 at } 25^{\circ}\text{C. The potential of the electrode will be } -\_\_\_\_\_ \times 10^{-2} \text{ V.}$
$\left( \frac{2.303RT}{F} = 0.059 \, \text{V} \right)$ - The mass of zinc produced by the electrolysis of zinc sulfate solution with a steady current of 0.015 A for 15 minutes is _____ \( \times \, 10^{-4} \) g.
(Atomic mass of zinc = 65.4 amu) - The mass of silver (Molar mass of Ag : 108 gmol–1 ) displaced by a quantity of electricity which displaces 5600 mL of O2 at S.T.P. will be _____ g.
- The potential for the given half cell at 298 K is\[(-) \ldots \times 10^{-2} \, \text{V}.\]\[2\text{H}^+ (\text{aq}) + 2e^- \rightarrow \text{H}_2 (\text{g})\]\[[\text{H}^+] = 1M, \, P_{\text{H}_2} = 2 \, \text{atm}\](Given: \( 2.303 \frac{RT}{F} = 0.06 \, \text{V}, \log 2 = 0.3 \))
- The metals that are employed in the battery industries are
A. Fe
B. Mn
C. Ni
D. Cr
E. Cd
Choose the correct answer from the options given below:
Top JEE Main Questions
- In a hydrogen like atom, when an electron jumps from the $M$ - shell to the $L$ - shell, the wavelength of emitted radiation is $\lambda$. If an electron jumps from $N$-shell to the $L$-shell, the wavelength of emitted radiation will be :
- Two masses $m$ and $\frac{m}{2}$ are connected at the two ends of a massless rigid rod of length $l$. The rod is suspended by a thin wire of torsional constant $k$ at the centre of mass of the rod-mass system(see figure). Because of torsional constant $k$, the restoring torque is $\tau =k\theta$ for angular displacement $\theta$. If the rod is rota ted by $\theta_0$ and released, the tension in it when it passes through its mean position will be:
What will be the equilibrium constant of the given reaction carried out in a \(5 \,L\) vessel and having equilibrium amounts of \(A_2\) and \(A\) as \(0.5\) mole and \(2 \times 10^{-6}\) mole respectively?
The reaction : \(A_2 \rightleftharpoons 2A\)- The value of is
- The number of terms of an is even. The sum of the odd terms is and of the even terms is . The last term exceeds the first by . Then the number of terms in the series is ______.