9 public questions tagged with this topic.
HS- can donate H+ (acid) to form S²⁻ or accept H+ (base) to form H₂S , making it amphoteric.
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Ionic Equilibrium - Acids Bases and pH and Ionization of Weak Acids Bases
A Bronsted-Lowry acid donates a proton. HCO₃- can donate H+ to form CO₃²⁻ .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Homogeneous and Heterogeneous Equilibria and Applications of Equilibrium Constant
HCO₃- can accept H+ to form H₂CO₃ , making it a base.
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Acid-Base Theories - Arrhenius Bronsted-Lowry Lewis and Salts Hydrolysis
Buffer capacity is exceeded and pH drops significantly correctly describes the effect or change asked about in this question. In pH and Buffer, understanding cause-and-effect relationships is essential for predicting biological outcomes. Buffer capacity is exceeded and pH drops significantly occurs because of specific molecular interactions, thermodynamic principles, or regulatory mechanisms that govern this biological process. The other options (Becomes neutral, Buffer capacity increases, and Becomes basic) describe either opposite effects, effects that occur under different conditions, or changes associated with unrelated processes.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
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
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
Increases slightly correctly describes the effect or change asked about in this question. In pH and Buffer, understanding cause-and-effect relationships is essential for predicting biological outcomes. Increases slightly occurs because of specific molecular interactions, thermodynamic principles, or regulatory mechanisms that govern this biological process. The other options (Decreases significantly, Remains constant, and Becomes neutral) describe either opposite effects, effects that occur under different conditions, or changes associated with unrelated processes.
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
