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📘 Biomolecules – Class 12 Chemistry | Carbohydrates (1:45 Hours Detailed Explanation)

Lets Learn with Rajnish Sir

In this video, only the CARBOHYDRATES part of the Biomolecules chapter (Class 12 Chemistry) is explained in complete depth with a 1 hour 45 minutes dedicated session by Rajnish Sir on Lets Learn with Rajnish Sir.
This lecture is 100% NCERT-based, board-focused, and extremely useful for Class 12 Board Exams, NEET, CUET, and other competitive exams.


👉 This is a full-length masterclass on CARBOHYDRATES only.

⏱️ Lecture Duration

🕒 Total Time: 1 Hour 45 Minutes (1:45:00)
📌 Only Carbohydrates – No other biomolecule included
⏱️ Detailed Time Stamps (Carbohydrates Only)
⏱️ 00:00 – 05:00
🔹 Introduction to Biomolecules
🔹 Importance of Carbohydrates in exams
⏱️ 05:00 – 20:00
🔹 Definition of Carbohydrates
🔹 Classification (Monosaccharides, Oligosaccharides, Polysaccharides)
⏱️ 20:00 – 40:00
🔹 Monosaccharides in detail
🔹 Glucose – structure, properties & reactions
🔹 Fructose – structure & comparison
⏱️ 40:00 – 55:00
🔹 Ring structure of glucose
🔹 Haworth & Fischer projection
🔹 Anomers & Epimers
⏱️ 55:00 – 01:10:00
🔹 Disaccharides
🔹 Sucrose, Maltose, Lactose
🔹 Reducing & Non-reducing sugars
⏱️ 01:10:00 – 01:25:00
🔹 Polysaccharides
🔹 Starch, Cellulose, Glycogen
🔹 Structure & biological importance
⏱️ 01:25:00 – 01:40:00
🔹 Important reactions of carbohydrates
🔹 Board exam frequently asked points
⏱️ 01:40:00 – 01:45:00
🔹 Quick revision
🔹 Exam tips & expected questions


🎯 Why This Video Is Important for Marks

✔️ Entire Carbohydrates chapter covered deeply
✔️ Line-by-line NCERT explanation
✔️ Helps in long answer & numerical questions
✔️ Very useful for 5–8 marks questions
✔️ Clears confusing concepts like
– Anomers
– Epimers
– Reducing sugar
✔️ Ideal for last-time revision before exam


📌 If you prepare this video properly, Carbohydrates questions will not trouble you in the exam.


👨‍🏫 About the Channel
Lets Learn with Rajnish Sir provides: 🔹 Class 11 & 12 Chemistry
🔹 NCERT-focused teaching
🔹 Board + Competitive exam strategy
🔹 Concept clarity with exam orientation


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