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SSC CGL
mediumQ. No. 14962-what-is-the-overall-cell-reaction-in-a-daniell-cell

What is the overall cell reaction in a Daniell cell?

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This SSC CGL Chemistry question asks: “What is the overall cell reaction in a Daniell cell?” The correct answer is Zn is oxidised to Zn²⁺ and Cu²⁺ is reduced to Cu. Daniell cell: Zn(s) oxidized at anode gives Zn2+; Cu2+ reduced at cathode gives Cu(s). E cell = 1.1V. Chemistry explains the composition, structure, properties and transformations of matter. A reliable answer begins by identifying whether the question concerns atomic structure, chemical bonding, periodicity, stoichiometry, acids and bases, redox chemistry, electrochemistry, organic nomenclature, metallurgy or everyday materials. Formulae and equations must be interpreted rather than memorised without context.

AZn is oxidised to Zn²⁺ and Cu²⁺ is reduced to Cu
BCu is oxidised to Cu²⁺ and Zn²⁺ is reduced to Zn
CBoth zinc and copper are oxidised
DBoth zinc and copper ions are reduced
Correct Answer: Zn is oxidised to Zn²⁺ and Cu²⁺ is reduced to CuYour Answer: A

Explanation

E cell = 1.1V. Option B (“Cu is oxidised to Cu²⁺ and Zn²⁺ is reduced to Zn”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Option C (“Both zinc and copper are oxidised”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Option D (“Both zinc and copper ions are reduced”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Identify the governing formula, definition or reaction and apply it consistently. The answer field, correct index and explanation therefore all identify Zn is oxidised to Zn²⁺ and Cu²⁺ is reduced to Cu. Daniell cell: Zn(s) oxidized at anode gives Zn2+; Cu2+ reduced at cathode gives Cu(s).

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FAQ

SSC CGL Chemistry FAQs

Common questions and clear answers for this topic.

How many chemistry questions typically appear in the SSC CGL exam?

Chemistry usually contributes a handful of questions within the General Awareness section, generally covering basic concepts rather than calculation-heavy problems.

Which chemistry topics are most important for SSC CGL preparation?

Atomic structure, periodic table trends, acids-bases-salts, metals and non-metals, and carbon compounds are the areas that appear most consistently across past papers.

Is NCERT chemistry enough to prepare for SSC CGL?

NCERT textbooks from classes 9 and 10 cover most of the conceptual base needed, though supplementing with general knowledge about everyday chemical compounds helps too.

What is the best way to remember chemical reactions and formulas for SSC CGL?

Linking reactions to real-world examples, like rusting or antacids, makes them easier to recall than memorizing formulas in isolation.

Does the SSC CGL chemistry syllabus overlap with the school board syllabus?

Yes, a large part of the syllabus mirrors class 9 and 10 science, making school-level revision a practical starting point.

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