10 public questions tagged with this topic.
pKa = -log Ka = -log(2.5 × 10⁻⁵) = 5 - log 2.5 ≈ 5 - 0.398 = 4.6 .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Physical Equilibrium - Solid-Liquid Gas-Liquid and Henry's Law
pKa = -log Ka , so Ka = 10⁻pKa = 10⁻⁵.² ≈ 6.31 × 10⁻⁶ .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Homogeneous and Heterogeneous Equilibria and Applications of Equilibrium Constant
5.76 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 (3.76, 4.76, and 6.76) 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
HCl 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 HCl directly address what is being asked. Among the other options, CH₃COOH, H₂CO₃, and NH₄⺠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
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
6 is the scientifically accurate answer to this question. Within the study of Amino Acids Basics, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 6 directly address what is being asked. Among the other options, 3.1, 9.7, and 10.5 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. 3
All of the above is the scientifically accurate answer to this question. Within the study of Titration of Amino Acids, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of All of the above directly address what is being asked. Among the other options, Its solubility, Its net charge, and Its behavior in electrophoresis 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. 3
Histidine is the accurate classification or categorization for the organism, molecule, or concept described in this question. In Titration of Amino Acids, proper classification is based on shared characteristics including morphological, biochemical, genetic, and evolutionary criteria. Histidine meets the specific diagnostic features and defining criteria that distinguish it from related groups. The other options (Glutamate, Arginine, and Lysine) belong to different taxonomic groups, represent different classification levels, or possess distinct characteristics that exclude them from this category.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 3
6 is the scientifically accurate answer to this question. Within the study of Titration of Amino Acids, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 6 directly address what is being asked. Among the other options, 2, 9.5, and 12 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. 3
