Which of the following statements is NOT true?

Nylon thread is weaker than cotton thread.

The correct answer is option 4. Nylon thread is weaker than cotton thread.

The statement that is NOT true is that Nylon thread is weaker than cotton thread.

While the strength of thread can vary depending on factors like thickness and processing, in general, nylon thread is stronger than cotton thread. Nylon is a synthetic polymer known for its high tensile strength, elasticity, and abrasion resistance. This makes it a popular choice for applications requiring a strong and durable thread, such as sewing sails, carpets, and fishing nets.

The other statements are all true:

Polymers occur in nature: Many natural materials like proteins, DNA, cellulose, and rubber are all examples of naturally occurring polymers.

Nylon is used in the making of parachutes: Due to its high strength and low weight, nylon is a common material used in parachute canopies.

Cellulose is made up of glucose units: Cellulose, the main component of plant cell walls, is a polysaccharide polymer consisting of linked glucose units.