Which one of the following is the major Ingredient of leather?

The correct answer is Collagen because it is the primary structural protein found in animal skins, which serves as the foundational material for leather.

• Step 1 (Source Material): Leather is produced by processing animal hides and skins. The dermis layer of these skins comprises about 85% of its total structure and is largely made up of the fibrous protein called collagen.
• Step 2 (Tanning Process): During the tanning process, the raw collagen fibers are cross-linked and chemically stabilized to prevent decay and create a durable material.
• Incorrect Options:
  • Carbohydrates is incorrect because carbohydrates are organic compounds like sugars and starches, which are not a structural component of animal skin or leather.
  • Syntans is incorrect because synthetic tannins (syntans) are chemicals or agents used during the retanning process, not a primary raw ingredient of the hide itself.
  • None of these is incorrect because the second option is the exact mathematical and scientific fact.