18 public questions tagged with this topic.
E = E° - (0.059/2) log (PH_₂/[H⁺]²) , [H⁺] = 10⁻⁴ . E = 0 - 0.0295 log (0.1/10⁻⁸) = 0 - 0.0295 × 7 = -0.2065 V .
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Electrochemical Cells - Galvanic Cells and Electrode Potential
E = E° - (0.059/2) log (PH_₂/[H⁺]²) , [H⁺] = 10⁻⁴ . E = 0 - 0.0295 log (0.1/10⁻⁸) = 0 - 0.0295 × 7 = -0.2065 V .
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Electrochemical Cells - Galvanic Cells and Electrode Potential
For BOH B+ + OH- , Kb = (x²/0.01 - x) ≈ (x²/0.01) = 4.0 × 10⁻⁶ . Solving, x = [OH-] = sqrt4.0 × 10⁻⁸ = 2.0 × 10⁻⁴ . pOH = -log(2.0 × 10⁻⁴) ≈ 3.7 , pH = 14 - 3.7 = 10.3 .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Physical Equilibrium - Solid-Liquid Gas-Liquid and Henry's Law
pH = 10 , pOH = 14 - 10 = 4 , [OH-] = 10⁻⁴ . For B + H₂O BH+ + OH- , Kb = ([OH-]²/[B]) = ((10⁻⁴)²/0.05) = (10⁻⁸/0.05) = 2.0 × 10⁻⁷ .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Physical Equilibrium - Solid-Liquid Gas-Liquid and Henry's Law
pH = -log[H+] = -log(2.0 × 10⁻⁴) = 4 - log 2 ≈ 4 - 0.3010 = 3.7 .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Ionic Equilibrium - Acids Bases and pH and Ionization of Weak Acids Bases
Using Henderson-Hasselbalch: pH = pKa + log ([X-]/[HX]) , pKa = -log(2.5 × 10⁻⁶) ≈ 5.6 , ([X-]/[HX]) = (0.05/0.1) = 0.5 , pH = 5.6 + log 0.5 = 5.6 - 0.301 = 5.3 .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Acid-Base Theories - Arrhenius Bronsted-Lowry Lewis and Salts Hydrolysis
7 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, 14, and 10) 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
pH = pKa is the scientifically accurate answer to this question. Within the study of pH and Buffer, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of pH = pKa directly address what is being asked. Among the other options, pH = 7, pH > pKa, and pH < pKa 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: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
14 is the scientifically accurate answer to this question. Within the study of pH and Buffer, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 14 directly address what is being asked. Among the other options, 10, 12, and 13 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: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
2.07 accurately defines or describes the concept asked in this question. Within pH and Buffer, precise definitions and terminology are essential for clear scientific communication. The other options (4, 7, and 10) 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
pH = pKa + log ([Base]/[Acid]) accurately defines or describes the concept asked in this question. Within pH and Buffer, precise definitions and terminology are essential for clear scientific communication. The other options (Mâ‚Vâ‚ + Mâ‚‚Vâ‚‚ = M₃(Vâ‚+Vâ‚‚), pH = -log [Hâº], and pH = log [OHâ»]) 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
pH = pKa + log ([Aâ»]/[HA]) is the scientifically accurate answer to this question. Within the study of pH and Buffer, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of pH = pKa + log ([Aâ»]/[HA]) directly address what is being asked. Among the other options, pH = log [Hâº], pH = -log [OHâ»], and pH = Kw / [Hâº] 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: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
