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Important Questions: Dry cell and lead accumulator, fuel cells for JEE

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The most important Dry cell and lead accumulator, fuel cells questions for JEE cover conceptual traps, standard results, and numerical patterns from Dry cell and lead accumulator, fuel cells. Goodmarks provides 11+ high-yield MCQs with full solutions.

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Syllabus context

Part of Redox Reactions and Electrochemistry in JEE Main Chemistry.

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Q1ChemistryUnit 7: Redox Reactions and Electrochemistry
In −1−…eactants are _{-1}-\ldots_{\text {eactants are }} continuously supplied energy which can be withdrawn indefinately until outside supply of reactant is maintained. These cells are more efficient than conventional batteries and moreover, these are eco-friendly.
Q2ChemistryUnit 7: Redox Reactions and Electrochemistry
Which of the following is an example of simple fuel cell?
Q3ChemistryUnit 7: Redox Reactions and Electrochemistry
Primary battery is a battery:
Q4ChemistryUnit 7: Redox Reactions and Electrochemistry
In hydrogen-oxygen fuel cell the carbon rods are immersed in hot aqueous solution of.
Q5ChemistryUnit 7: Redox Reactions and Electrochemistry
Assertion H2+O2\boldsymbol{H}_{2}+\boldsymbol{O}_{2} fuel cell gives a constant voltage throughout its life. Reason In this fuel cell, H2H_{2} reacts with OH−O H^{-} ions, yet the overall concentration of OH−O H^{-} ions does not change
Q6ChemistryUnit 7: Redox Reactions and Electrochemistry
ln⁡\ln a H2−O2H_{2}-O_{2} fuel cell, combustion of hydrogen occurs to:
Q7ChemistryUnit 7: Redox Reactions and Electrochemistry
Assertion A large dry cell has higher emf. Reason The emf of a dry cell is independent of its size.
Q8ChemistryUnit 7: Redox Reactions and Electrochemistry
Hydrogen could well be a fuel for the future. Which of the following statement is true about the potential use of hydrogen as a fuel?

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Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

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Key areas include Dry cell and lead accumulator, fuel cells. Prioritise these before moving to edge cases.

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