Macromolecules, also called polymers, are very large molecules made up of small repeating units called monomers. The concept was accepted in the 1920s due to the work of Hermann Staudinger, who explained that materials like rubber and polystyrene are long chain molecules.
The process of forming polymers from monomers is called polymerization, which has greatly changed modern life. Today, many natural materials like wood and cotton are replaced by synthetic polymers such as plastics and fibres, making the world a “plastic society.”
Polymers are also classified into different types, including synthetic polymers and biopolymers, which are found naturally in living organisms and are essential for life.
📥 Download PDF – Unit 14 Macromolecules Notes
Skip to PDF contentYou can download Class 12 Chemistry Unit 14: Macromolecules Notes (Punjab Board) in PDF format from the link below. These notes are prepared in a simple, clear, and student-friendly style to help you understand concepts easily and prepare effectively for exams.
👉 Click Here to Download Unit 14 Macromolecules Notes (PDF)
What’s Included in This PDF:
- ✔️ Complete Macromolecules Unit 14 Notes
- ✔️ Important MCQs for practice
- ✔️ Short Questions with answers
- ✔️ Long Questions for board exam preparation
- ✔️ Solved Exercise of Unit 14
❓ FAQs – Class 12 Chemistry Unit 14 Macromolecules
Q1: What are macromolecules?
Answer: Macromolecules are very large molecules made of many small repeating units called monomers.
Q2: What are polymers?
Answer: Polymers are large molecules formed by joining many monomers through a chemical process called polymerization.
Q3: What is polymerization?
Answer: Polymerization is the process in which small monomer molecules join together to form a large polymer.
Q4: Who introduced the macromolecular concept?
Answer: The macromolecular concept was introduced by Hermann Staudinger in the 1920s.
Q5: What are synthetic polymers?
Answer: Synthetic polymers are man-made polymers like polythene, PVC, and nylon, used in plastics and fibres.
Q6: What are biopolymers?
Answer: Biopolymers are natural polymers found in living organisms, such as proteins, carbohydrates, and nucleic acids.
📝 MCQs – Class 12 Chemistry Unit 14 Macromolecules
Q1: Macromolecules are also called:
A) Monomers
B) Polymers
C) Elements
D) Compounds
✅ Answer: B) Polymers
Q2: Small repeating units in polymers are called:
A) Polymers
B) Macromolecules
C) Monomers
D) Chains
✅ Answer: C) Monomers
Q3: The process of forming polymers is called:
A) Decomposition
B) Polymerization
C) Combustion
D) Neutralization
✅ Answer: B) Polymerization
Q4: Who introduced the macromolecular hypothesis?
A) Dalton
B) Bohr
C) Staudinger
D) Avogadro
✅ Answer: C) Staudinger
Q5: Polythene is an example of:
A) Biopolymer
B) Synthetic polymer
C) Monomer
D) Protein
✅ Answer: B) Synthetic polymer
Q6: Biopolymers are found in:
A) Rocks
B) Air
C) Living organisms
D) Plastics
✅ Answer: C) Living organisms
Q7: Rubber is an example of:
A) Monomer
B) Synthetic element
C) Natural polymer
D) Salt
✅ Answer: C) Natural polymer