Chapter Mock Test
Total Marks:43
Duration:45 min
Total Questions:20
Difficulty:Mixed
Test Structure
- —Section A: 10 MCQs (1 mark each = 10 marks)
- —Section B: 6 Short Answer (3 marks each = 18 marks)
- —Section C: 2 Long Answer (5 marks each = 15 marks)
- —Total: 18 questions in 45 minutes
Before taking the test
- —Remember carbon valency is ALWAYS 4. It forms 4 covalent bonds - understand single, double, and triple bond differences
- —Know hydrocarbon formulas: Alkanes CₙH₂ₙ₊₂, Alkenes CₙH₂ₙ, Alkynes CₙH₂ₙ₋₂
- —Understand saturated (single bonds only, less reactive) vs unsaturated (multiple bonds, more reactive)
- —Practice writing combustion equations: Complete produces CO₂ + H₂O, Incomplete produces CO + C + H₂O
- —Learn key functional groups: -OH (alcohol), -CHO (aldehyde), -COOH (carboxylic acid), -CO- (ketone)
- —Understand isomerism - structural isomers have same formula but different structures and properties
- —Compare allotropes of carbon: Diamond (hard, 3D) vs Graphite (soft, layered) - SAME element, DIFFERENT properties
- —Know IUPAC nomenclature: Prefix (carbon count) + Root (bond type) + Suffix (functional group). Practice naming examples.
Key Equations & Formulas
Hydrocarbon Formulas:
Alkane: CₙH₂ₙ₊₂
Alkene: CₙH₂ₙ
Alkyne: CₙH₂ₙ₋₂
Combustion (Complete):
CₙH₂ₘ + (n + m/4)O₂ → nCO₂ + (m/2)H₂O + Heat
Combustion Examples:
CH₄ + 2O₂ → CO₂ + 2H₂O
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
Incomplete Combustion:
Limited O₂ → CO + C + H₂O
(Yellow sooty flame)
Key Topics Checklist
Carbon's unique properties (valency 4, catenation)
Covalent bonding (single, double, triple bonds)
Hydrocarbon classification and formulas
Functional groups and their properties
Saturated vs unsaturated compounds
Isomerism (structural and positional)
Complete and incomplete combustion
Allotropes of carbon (diamond, graphite, fullerenes)
IUPAC nomenclature
Boiling point trends in alkane series