Consider the following compounds. Rank the above compounds in order of increasing basicity(weakest → strongest)
4 < 3 < 1 < 2 correct as per chemistry principle.
Ref: NCERT Chemistry Class XI and XII
#acid-base chemistry
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Which species acts as a Lewis acid?
A Lewis acid accepts an electron pair. BF₃ has an incomplete octet and can accept an electron pair, making it a Lewis acid.
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Relationship Between Kp Kc and Factors Affecting Equilibrium - Le Chatelier
Which of the following is a Lewis base?
A Lewis base donates an electron pair. CN- has a lone pair on carbon or nitrogen, making it a Lewis base.
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Physical Equilibrium - Solid-Liquid Gas-Liquid and Henry's Law
Which species can act as both a Lewis acid and base?
H₂O can accept an electron pair (Lewis acid) or donate a lone pair (Lewis base), making it amphoteric.
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Ionic Equilibrium - Acids Bases and pH and Ionization of Weak Acids Bases
What is the conjugate acid of CO₃²⁻ ?
The conjugate acid of CO₃²⁻ is formed by accepting a proton ( H+ ), resulting in HCO₃- .
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Chemical Equilibrium - Law of Mass Action and Equilibrium Constant
What is the conjugate base of HSO₄- ?
HSO₄- loses a proton ( H+ ) to form SO₄²⁻ , its conjugate base.
Ref: NCERT Class 11 Chemistry > Chapter 6: Equilibrium > Topic: Acid-Base Theories - Arrhenius Bronsted-Lowry Lewis and Salts Hydrolysis
What is the relationship between pH and pOH?
pH + pOH = 14 accurately defines or describes the concept asked in this question. Within Acid, Base, pH, precise definitions and terminology are essential for clear scientific communication. The other options (pH = 14 × pOH, pH + pOH = 7, and pH = 10â»â· × pOH) 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
Which equation represents the pH calculation?
pH = -log[Hâº] accurately defines or describes the concept asked in this question. Within Acid, Base, pH, precise definitions and terminology are essential for clear scientific communication. The other options (pH = log[Hâº], pH = log[OHâ»], 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
The ionic product of water (Kw) at 25°C is:
1 × 10â»Â¹â´ is the scientifically accurate answer to this question. Within the study of Acid, Base, pH, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of 1 × 10â»Â¹â´ directly address what is being asked. Among the other options, 1 × 10â»â´, 1 × 10â»â·, and 1 × 10â»Â¹â° 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
What is the pH of a neutral solution at 25°C?
7 accurately defines or describes the concept asked in this question. Within Acid, Base, pH, precise definitions and terminology are essential for clear scientific communication. The other options (6, 8, and 9) 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
Which of the following pairs of solutions can act as a buffer?
CH₃COOH and CH₃COOâ»Na is the scientifically accurate answer to this question. Within the study of Acid, Base, pH, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of CH₃COOH and CH₃COOâ»Na directly address what is being asked. Among the other options, HCl and NaCl, NaOH and NaCl, and Hâ‚‚SOâ‚„ and HSOâ‚„â» do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
Which of the following is an amphiprotic species?
Hâ‚‚O is the accurate classification or categorization for the organism, molecule, or concept described in this question. In Acid, Base, pH, proper classification is based on shared characteristics including morphological, biochemical, genetic, and evolutionary criteria. Hâ‚‚O meets the specific diagnostic features and defining criteria that distinguish it from related groups. The other options (NH₃, OHâ», and HCl) 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. 2
