Calculate the molality of 12.5% w/w sulphuric acid?
1.45m correct as per chemistry principle.
Ref: NCERT Chemistry Class XII — Solutions
#sulfuric acid
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The reaction of aniline with H₂SO₄ at 453-473 K produces:
Aniline (C₆H₅NH₂) with H₂SO₄ at high temperature forms p-aminobenzene sulphonic acid (sulphanilic acid), as per the PDF’s chemical properties.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Carbylamine Reaction and General Reactions
The product of aniline with H₂SO₄ at 453-473 K is:
Aniline (C₆H₅NH₂) with H₂SO₄ at high temperature forms p-aminobenzene sulphonic acid (sulphanilic acid), as per the PDF’s chemical properties.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Alkylation, Acylation and Electrophilic Substitution
The reaction of aniline with concentrated H₂SO₄ at 453-473 K produces:
Aniline forms anilinium hydrogensulphate, which rearranges on heating to p-aminobenzene sulphonic acid (sulphanilic acid).
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Alkylation, Acylation and Electrophilic Substitution
What is the product when phenol reacts with conc. H₂SO₄ at 25°C?
Phenol reacts with conc. H₂SO₄ at 25°C to form phenol-2-sulfonic acid (2-hydroxybenzenesulfonic acid) as the major product due to ortho substitution.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Physical Properties and Acidity of Alcohols and Phenols
Which catalyst is used in the Contact Process for sulfuric acid production?
V 2 O 5 (Vanadium pentoxide) catalyzes the oxidation of SO 2 to SO 3 .
Ref: NCERT Class 12 Chemistry > Chapter 4: d and f Block Elements > Topic: Applications of d and f Block Elements
In a lead storage battery, what is the electrolyte?
The electrolyte in a lead storage battery is dilute sulfuric acid (H₂SO₄).
Ref: NCERT Class 12 Chemistry > Chapter 2: Electrochemistry > Topic: Batteries - Primary Secondary and Fuel Cells
What is the mass of CaSO₄ produced when 13.6 g of Ca(OH)₂ reacts with excess H₂SO₄? (Molar masses: Ca(OH)₂ = 74 g/mol, C
Reaction: Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O. Moles of Ca(OH)₂ ≈ 0.1838 mol. 1 mol Ca(OH)₂ produces 1 mol CaSO₄; mass ≈ 25 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
How many grams of H₂SO₄ are required to neutralize 8 g of NaOH completely? (Molar masses: H₂SO₄ = 98 g/mol, NaOH = 40 g/
Reaction: H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O. Moles of NaOH = 8/40 = 0.2 mol. 2 mol NaOH need 1 mol H₂SO₄; 0.2 mol needs 0.1 mol. Mass = 0.1 × 98 = 9.8 g.
Ref: NCERT Class 11 Chemistry > Chapter 1: Some Basic Concepts of Chemistry > Topic: Laws of Chemical Combination - Conservation Mass Definite Multiple
What is the relation between normality and molarity for Hâ‚‚SOâ‚„?
Normality = 2 × Molarity 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 (Normality = Molarity, Normality = 1/2 × Molarity, and Normality = 3 × Molarity) 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
Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2
Which of the following acids is diprotic?
H₂SO₄ 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 H₂SO₄ directly address what is being asked. Among the other options, HCl, HNO₃, and HBr 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 conjugate base of Hâ‚‚SOâ‚„?
HSOâ‚„â» 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 (SO₄²â», H₃Oâº, and 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
