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SSC CGL
mediumQ. No. 14934-in-which-of-the-following-processes-is-entropy-of-system-decreasing

In which of the following processes is entropy of system decreasing?

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This SSC CGL Chemistry question asks: “In which of the following processes is entropy of system decreasing?” The correct answer is Crystallization from solution. Crystallization is an ordering process where disorder decreases so entropy decreases. Other processes increase entropy. Option A (“Melting of ice”) 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 (“Vaporization of water”) is incorrect because it does not satisfy the chemical formula, reaction, periodic trend, numerical relation, oxidation state or definition required by the question.

AMelting of ice
BVaporization of water
CDissolution of salt in water
DCrystallization from solution
Correct Answer: Crystallization from solutionYour Answer: D

Explanation

rder decreases so entropy decreases. Other processes increase entropy. Option A (“Melting of ice”) 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 (“Vaporization of water”) 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 (“Dissolution of salt in water”) 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 Crystallization from solution. Crystallization is an ordering process where disorder decreases so entropy decreases.

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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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In which of the following... | SSC CGL Chemistry MCQ | Exambodh