Some Compounds Of Industrial Importance — Flashcards
Kerala Board · Class 10 · Chemistry
24 flashcards for Some Compounds Of Industrial Importance (Kerala Board Class 10 Chemistry) to test yourself on key terms and facts.
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What is the chemical formula of ammonia and how is it prepared in the laboratory?
Answer
Chemical formula: NH₃ Laboratory preparation: 2NH₄Cl + Ca(OH)₂ → CaCl₂ + 2H₂O + 2NH₃(g) Ammonia is a colorless gas with pungent smell. It turns red litmus blue showing its basic nature. The gas is c…
Describe the Haber process for industrial production of ammonia.
Answer
Haber Process: N₂(g) + 3H₂(g) ⇌ 2NH₃(g) + heat Conditions: - High pressure (200-300 atm) - High temperature (450°C) - Catalyst: Sponge iron - Reactant ratio N₂:H₂ = 1:3 Sources: - Nitrogen: Atmosphe…
What is a reversible reaction? Give an example.
Answer
Reversible reactions are reactions that can proceed in both forward and backward directions simultaneously. Example: NH₃ + HCl ⇌ NH₄Cl Characteristics: - Uses ⇌ symbol - Products can convert back to…
State Le Chatelier's Principle and its significance.
Answer
Le Chatelier's Principle: 'When the concentration, pressure or temperature of a system at equilibrium is changed, the system will readjust itself so as to nullify the effect of that change and attain …
How does concentration change affect chemical equilibrium?
Answer
Effect of Concentration on Equilibrium: - Increasing reactant concentration → Forward reaction rate increases - Decreasing reactant concentration → Forward reaction rate decreases - Increasing produc…
Write the complete Contact process for manufacturing sulfuric acid.
Answer
Contact Process Steps: 1. S(s) + O₂(g) → SO₂(g) 2. 2SO₂(g) + O₂(g) → 2SO₃(g) (Catalyst: V₂O₅) 3. SO₃(g) + H₂SO₄(l) → H₂S₂O₇(l) (Oleum formation) 4. H₂S₂O₇(l) + H₂O(l) → 2H₂SO₄(l) Note: SO₃ is not di…
What are the important physical properties of concentrated sulfuric acid?
Answer
Physical Properties of H₂SO₄: - Colorless liquid - Higher viscosity than water - Denser than water - Highly soluble in water - Dissolution in water is highly exothermic Safety rule: Always add acid …
Explain the dehydrating property of concentrated sulfuric acid with an example.
Answer
Dehydrating Property: Concentrated H₂SO₄ removes chemically combined water or H and O atoms in 2:1 ratio from compounds. Example with sugar: C₁₂H₂₂O₁₁ → 12C + 11H₂O (con. H₂SO₄) Result: Black carbon…
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
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