Water pipes are produced from

Step 1: Analyze the question The question asks which polymer is used to make water pipes. This is about the uses of common synthetic polymers.

Step 2: Review the options

• A. Polyethene (polythene): Used for plastic bags, films, bowls, buckets, and packaging. A type called HDPE is used for some pipes, but it is mainly known for bags and containers.
• B. Perspex (polymethyl methacrylate): A clear, glass-like plastic used for windows, lenses, and signs.
• C. Polystyrene: Used for packaging foam, disposable cups, and insulation.
• D. Polyvinyl chloride (PVC): Rigid, durable, and resistant to water and corrosion. It is the standard material for water pipes, drainage pipes, and electrical conduit. It is also used for insulation of electric cables, floor tiles, and raincoats.

Step 3: Solve In the WASSCE syllabus, the polymer linked with pipes is PVC. Its rigid, strong, and non-corroding nature makes it ideal for plumbing, unlike metal pipes that rust.

Answer: D. Poly vinyl chloride

Exam tip: Memorize the polymer uses with this quick list:

• PVC → Pipes, Vinyl floor tiles, cable coating
• Polyethene → bags, bottles, bowls
• Polystyrene → foam packaging, cups
• Perspex → clear sheets (glass substitute)
• Nylon → ropes, fabrics
• Teflon (PTFE) → non-stick pans

Think "PVC = Pipes" and you won't forget it.