Properties of synthetic fibres include which of the following?

• A. Very heavy.
• B. High strength and toughness, good abrasion and heat resistance, good chemical resistance, lightweight, easily dyed.
• C. Very low strength and poor heat resistance.
• D. Not dyed.

Answer: (B)

Synthetic fibres are designed to deliver a combination of strength, durability and colour performance. Their long polymer chains pack tightly to create strong, tough fibres, which makes them resistant to breaking under stress. That same structure gives good abrasion resistance, so fabrics wear well under friction. The crystalline regions and the nature of the polymers also give heat resistance and chemical resistance, so fibres stay stable when exposed to heat or common detergents and solvents. Because these fibres have relatively low density, they are lightweight, which helps in comfortable fabrics and performance garments. In addition, they can be dyed effectively, providing vibrant colors and good colorfastness when the right dyes and processes are used.

So the description matches the typical properties of synthetic fibres: strong, durable, resistant to heat and chemicals, lightweight, and dyeable.