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SSC CGL
hardQ. No. 14936-the-wave-number-of-the-first-line-in-balmer-series-of-hydrogen-is

The wave number of the first line in Balmer series of hydrogen is

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This SSC CGL Chemistry question asks: “The wave number of the first line in Balmer series of hydrogen is” The correct answer is 15233 cm^-1. Balmer series n1=2 to n=3 transition. Wave number = 15233 cm^-1. Redox questions should identify oxidation as electron loss or increase in oxidation number and reduction as electron gain or decrease in oxidation number. Acid basicity refers to the number of ionisable protons, not simply the number of hydrogen atoms written in a formula. Option B (“20565 cm^-1”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question.

A15233 cm^-1
B20565 cm^-1
C27419 cm^-1
D5331 cm^-1
Correct Answer: 15233 cm^-1Your Answer: A

Explanation

Wave number = 15233 cm^-1. Option B (“20565 cm^-1”) 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 (“27419 cm^-1”) 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 (“5331 cm^-1”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. The answer field, correct index and explanation therefore all identify 15233 cm^-1. Balmer series n1=2 to n=3 transition.

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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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