12 public questions tagged with this topic.
Lambdam° = λ°Na⁺ + λ°Cl⁻ . 126.4 = 50.1 + λ°Cl⁻ , λ°Cl⁻ = 76.3 S cm² mol⁻¹ .
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Conductance - Conductivity Molar Conductivity and Kohlrausch Law
Lambdam° = λ°Na⁺ + λ°Cl⁻ . 126.4 = 50.1 + λ°Cl⁻ , λ°Cl⁻ = 76.3 S cm² mol⁻¹ .
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Conductance - Conductivity Molar Conductivity and Kohlrausch Law
Δ Tf = i · Kf · m . Δ Tf = 1.8 × 1.86 × 0.1 ≈ 0.335 K .
Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Colligative Properties - Depression of Freezing Point
Moles = 0.6 × 0.2 = 0.12 mol . Mass of NaCl = 0.12 × 58.5 = 7.02 g . Total mass = 200 × 1.05 = 210 g . Mass of water = 210 - 7.02 = 202.98 g = 0.20298 kg . Molality = (0.12/0.20298) ≈ 0.591 mol/kg .
Ref: NCERT Class 12 Chemistry > Chapter 1: Solutions > Topic: Abnormal Molar Masses and van't Hoff Factor
The reducing agent is oxidized. Cl (0 in Cl₂) becomes +5 in NaClO₃ and -1 in NaCl; Cl₂ reduces itself.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Oxidizing and Reducing Agents and Strength
F (0 in F₂) becomes -1 in NaF, gaining electrons.
Ref: NCERT Class 11 Chemistry > Chapter 7: Redox Reactions > Topic: Applications of Redox Reactions and Disproportionation
Reaction: NaOH + HCl → NaCl + H₂O. Moles of NaCl = 11.7/58.5 = 0.2 mol. 1 mol NaCl from 1 mol NaOH; mass = 0.2 × 40 = 8 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Reactions in Solutions and Mass Percentage and Numericals
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
5 ppm = 5 g NaCl in 10⁶ g water. Moles = 5 / 58.5 ≈ 0.0855 mol. Mass of solvent = 10⁶ g = 1000 kg. Molality = 0.0855 / 1000 ≈ 8.55 × 10⁻⁵ m.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Concentration Terms - Molarity Molality and Mole Fraction
Hydration energy is greater than lattice energy is the scientifically accurate answer to this question. Within the study of Chemical Bonding, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of Hydration energy is greater than lattice energy directly address what is being asked. Among the other options, High lattice energy, Low hydration energy, and Hydration energy is lower than lattice energy do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.
Ref: Campbell Biology, Urry et al., 12th Ed.
5% accurately defines or describes the concept asked in this question. Within Water and Mole Concept, precise definitions and terminology are essential for clear scientific communication. The other options (0.5%, 10%, and 20%) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
1M accurately defines or describes the concept asked in this question. Within Water and Mole Concept, precise definitions and terminology are essential for clear scientific communication. The other options (0.5M, 2M, and 4M) either describe related but distinct concepts, use incorrect terminology, or confuse similar-sounding terms that have different scientific meanings. A thorough understanding of exact definitions helps distinguish between closely related biological concepts and is crucial for competitive examinations.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
