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SSC CGL
mediumQ. No. 14917-according-to-raoult-s-law-the-vapour-pressure-of-solution-is

According to Raoult's law the vapour pressure of solution is

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This SSC CGL Chemistry question asks: “According to Raoult's law the vapour pressure of solution is” The correct answer is Less than vapour pressure of solvent. Raoult's law: P = x1 P0. Addition of non-volatile solute lowers vapour pressure below pure solvent vapour pressure. Formulae and equations must be interpreted rather than memorised without context. Option A (“Equal to vapour pressure of solvent”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Option B (“Greater than vapour pressure of solvent”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question.

AEqual to vapour pressure of solvent
BGreater than vapour pressure of solvent
CLess than vapour pressure of solvent
DEqual to vapour pressure of solute
Correct Answer: Less than vapour pressure of solventYour Answer: C

Explanation

on-volatile solute lowers vapour pressure below pure solvent vapour pressure. Option A (“Equal to vapour pressure of solvent”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question. Option B (“Greater than vapour pressure of solvent”) 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 (“Equal to vapour pressure of solute”) 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 Less than vapour pressure of solvent. Raoult's law: P = x1 P0. Addition of non-volatile solute lowers vapour pressure below pure solvent vapour pressure.

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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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