#sodium chloride

Biochemistry

After sodium chloride, which one of the following compounds has the maximum concentration in sea water?

This outcome reflects quantitative reasoning, where ratio, percentage and series logic determine correct calculation. Option A captures this correctly because it meets mathematical and logical criteria, consistent with textbook descriptions and experimental observations in aptitude and reasoning.

Ref: Agrawal, Quantitative Aptitude for Competitive Examinations, Chapter 5, Logical Reasoning and Probability, covers ratios, percentages, series completion, time-distance and analytical reasoning explaining problem-solving strategies for competitive assessments.

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General Biology

How many microliters of 0.1 M solution of sodium chloride will make 10 ml of 5 mM sodium chloride?

This outcome reflects core biological organization, where structure-function relationships govern cellular processes. Option C captures this correctly because it integrates fundamental principles, consistent with textbook descriptions and experimental observations in general biology.

Ref: Campbell et al., Biology, 11th Edition, Chapter 2, Chemical Basis of Life, discusses fundamental biological principles and molecular organization providing broad foundation for life sciences understanding.

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Redox Titrations and Equivalent Weight and Normality

In the reaction 2KMnO₄ + 16H₂SO₄ + 10NaCl → 5Cl₂ + 2MnSO₄ + 8H₂O + 5Na₂SO₄ + K₂SO₄, how many electrons are transferred?

Oxidation: 10Cl− → 5Cl₂ + 10e−. Reduction: 2MnO₄− + 10e− → 2Mn₂+. Total electrons = 10.

Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Redox Titrations and Equivalent Weight and Normality

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Applications of Redox Reactions and Disproportionation

In the reaction 2Na + Cl₂ → 2NaCl, what is the oxidizing agent?

The oxidizing agent accepts electrons. Cl₂ (0) gains electrons to become Cl− (-1), oxidizing Na.

Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation

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Concentration Terms - Molarity Molality and Mole Fraction

What is the mole fraction of NaCl in a solution made by dissolving 5.85 g of NaCl in 90 g of water? (Molar masses: NaCl

Moles of NaCl = 0.1 mol. Moles of H₂O = 5 mol. Total moles = 5.1; mole fraction = 0.1/5.1 ≈ 0.0196.

Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Concentration Terms - Molarity Molality and Mole Fraction

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