UP Board Chemistry: Final Scoring Phase (2026)

UNITS 8, 9 & 10 | TOTAL WEIGHTAGE: 21 MARKS

UNIT 8: ALDEHYDES, KETONES & ACIDS 08 MARKS

Setter's Insight: Is unit se Aldol aur Cannizzaro reaction sabse favorite hain. Mechanism of Nucleophilic addition skip mat karna[cite: 37].
Repeated 5 Marks 1. Aldol & Cannizzaro Reactions:
  • Aldol: Needs \(\alpha\)-Hydrogen. Mechanism is mandatory for full marks.
  • Cannizzaro: Occurs in Aldehydes with NO \(\alpha\)-Hydrogen (e.g., Formaldehyde).
2. Distinguished Tests:
  • Tollen’s Test: Silver mirror formation (only for Aldehydes).
  • Fehling’s Test: Red precipitate (Aliphatic Aldehydes only)[cite: 37].
3. Acidity of Carboxylic Acids:

Reasoning question: "Why Carboxylic acids are more acidic than phenols?" Focus on the stability of the Carboxylate ion due to resonance[cite: 38].

UNIT 9: AMINES 06 MARKS

Setter's Insight: Basic strength ka order (Aqueous vs Gas) har saal pucha jata hai. Is saal Diazonium salts se conversions aane ke high chances hain[cite: 40, 41].
Conceptual King 1. Basic Strength of Amines:
$$Gas Phase: 3^\circ > 2^\circ > 1^\circ > NH_3$$ $$Aqueous (Methyl): 2^\circ > 1^\circ > 3^\circ > NH_3$$

Reason: +I effect, Solvation effect, and Steric hindrance ka combine role[cite: 40].

2. Preparation Name Reactions:
  • Gabriel Phthalimide Synthesis: Used for 1-degree aliphatic amines ONLY.
  • Hofmann Bromamide Degradation: Decreases one Carbon atom in the chain[cite: 40].
3. Identification Test:

Carbylamine Reaction: Foul smelling Isocyanides are formed (Only Primary Amines give this)[cite: 40].

UNIT 10: BIOMOLECULES 07 MARKS

Setter's Insight: Yeh pure theory unit hai. Glucose structure ke evidence reactions aur DNA vs RNA ke table par focus rakho[cite: 44, 48].
Long Answer Focus 1. Structure of Glucose:
  • Reaction with HI: Proof of straight chain.
  • Reaction with \(Br_2\) water: Proof of Aldehydic group.
  • Reaction with Acetic Anhydride: Proof of 5 \(OH\) groups[cite: 44].
2. Proteins:
  • Peptide Bond: Linkage between amino acids.
  • Denaturation: Loss of biological activity (e.g., Boiling of Egg)[cite: 46].
[Image of DNA vs RNA structural difference]
3. Vitamins & Nucleic Acids:
  • Vitamins Table: Deficiency diseases (A, C, D, B12)[cite: 47].
  • DNA vs RNA: Sugar (Deoxyribose vs Ribose) and Bases (Thymine vs Uracil)[cite: 48].

FINAL EXPERT VERDICT (FEB 18 EXAM)

Organic Chemistry handles 35 Marks total. In last 3 units se 21 marks fix hain. Reactions ko ratne ke bajaye conditions (like alpha-H) par dhyan do. Biomolecules ko revision ke liye last 2 din ke liye rakho taaki facts yaad rahein.

Strictly as per UP Board Official Syllabus 2025-26. No removed chapters (Polymers/Everyday life) included.