The product formed when ethanol reacts with ethanoic acid in presence of concentrated H₂SO₄ is:
A. Ethyl ethanoate
B. Ethane
C. Ethene
D. Methanol
Answer: Option A
Solution (By JKSSB Mock Tests)
C₂H₅OH + CH₃COOH ⇌ CH₃COOC₂H₅ + H₂O (esterification). Conc. H₂SO₄ acts as catalyst and dehydrating agent. Ethyl ethanoate is an ester with fruity smell.
Explanation:
V₂O₅ catalyzes the oxidation of SO₂ to SO₃ in the Contact process for sulfuric acid: 2SO₂ + O₂ ⇌ 2SO₃. Fe is used for ammonia (Haber). Pt-Rh gauze for nitric acid (Ostwald). Sodium hydroxide is made by chlor-alkali electrolysis, no catalyst needed. V₂O₅ is preferred over Pt because it is cheaper and less susceptible to poisoning by arsenic impurities.
Explanation:
Plaster of Paris (CaSO₄·½H₂O) sets by rehydrating to gypsum (CaSO₄·2H₂O) when mixed with water: CaSO₄·½H₂O + 1½H₂O → CaSO₄·2H₂O. The interlocking crystals of gypsum provide hardness. It expands slightly on setting, making it ideal for casting. Dehydration is the opposite. Oxidation and carbonation are not involved.
Explanation:
NaOH is a strong base, fully dissociating into Na⁺ and OH⁻ ions. NH₄OH is a weak base. Ca(OH)₂ and Mg(OH)₂ are sparingly soluble but are considered strong bases in terms of dissociation of dissolved portion, but NaOH is the strongest among common ones.
No comments yet. Be the first to start the discussion!