MHT-CET Chemistry · Teaching notes
Aromatic Compounds — MHT-CET Chemistry
Aromatic Compounds in MHT-CET Chemistry is a reactions chapter with one HARD question in thirty-five. It asks three kinds of thing: what makes a compound aromatic and which class it belongs to, where an incoming group goes on the benzene ring, and what happens to the side chain or the ring when it is oxidised, ozonised or diazotised. Every PYQ is tagged.
Every subtopic, worked example, formula and trap in one printable document — answers shown, ready to share.
Subtopic notes
Aromaticity, Classes of Aromatic Compounds and Natural Sources
8 PYQsAn aromatic compound has a planar, cyclic, fully conjugated ring with 4n + 2 π electrons; it may be benzenoid (built on a benzene ring) or non-benzenoid (tropone), carbocyclic or heterocyclic (pyrrole, furan, thiophene).
Electrophilic Substitution: the Reactions and Where the Group Goes
12 PYQsBenzene keeps its aromatic ring by substituting rather than adding: an electrophile (Cl⁺, NO₂⁺, R⁺, RCO⁺, HCO⁺) replaces a ring H, and a group already on the ring decides whether the new one goes ortho/para or meta.
Side-Chain Oxidation, Addition to Benzene, and Diazonium Chemistry
15 PYQsThe reactions that do not substitute the ring: strong oxidants cut any alkyl side chain down to –COOH, chromyl chloride stops at –CHO, benzene adds Cl₂ or ozone under forcing conditions, and a diazonium salt or a Grignard reagent carries the ring into a new compound.
Formula & revision sheet
0 formulas · 7 reference tables · 8 gotchas across all subtopics — the exam-eve cheat-sheet
Formula & revision sheet
0 formulas · 7 reference tables · 8 gotchas across all subtopics — the exam-eve cheat-sheet
Reference tables (2)
Watch out for (1)
- Naphthalene as non-benzenoid→ Aromaticity and the Classes of Aromatic Compounds
Reference tables (2)
Watch out for (3)
- Hexachlorobenzene as C₆H₆Cl₆→ The Substitution Reactions and Their Reagents
- Toluene as the starting compound→ Directing Effects: Ortho/Para or Meta
- Mononitration of phenol→ Directing Effects: Ortho/Para or Meta
Reference tables (3)
Watch out for (4)
- Keeping the side-chain carbons→ Oxidising the Side Chain
- Benzal chloride from chromyl chloride→ Oxidising the Side Chain
- Gammexane as a herbicide→ Addition to Benzene: Ozonolysis and BHC
- Stopping at the aldehyde→ Diazonium Salts, Wurtz–Fittig and a Grignard on a Nitrile
PYQ weightage by concept
7 concepts · 35 PYQs — where the marks actually sit, so you know what to drill first
PYQ weightage by concept
7 concepts · 35 PYQs — where the marks actually sit, so you know what to drill first
| Concept | PYQs | Share |
|---|---|---|
| Aromaticity and the Classes of Aromatic Compounds | 5 | 14% |
| Aromatic Compounds from Nature | 3 | 9% |
| Concept | PYQs | Share |
|---|---|---|
| Directing Effects: Ortho/Para or Meta | 7 | 20% |
| The Substitution Reactions and Their Reagents | 5 | 14% |
| Concept | PYQs | Share |
|---|---|---|
| Oxidising the Side Chain | 8 | 23% |
| Diazonium Salts, Wurtz–Fittig and a Grignard on a Nitrile | 4 | 11% |
| Addition to Benzene: Ozonolysis and BHC | 3 | 9% |
Test yourself on Aromatic Compounds
15 past MHT-CET questions from this chapter, timed at 14 minutes and marked the way the exam marks it. You see your score and every answer the moment you finish. Free to start.