For making PVC pipes, which type of plastic is used?

Which of these plastics is a polymer?

Syringe that is made from a type of plastic called -----

It takes 24 hours to fill a swimming pool using two pipes. If the pipe of larger diameter is used for 8 hours and the pipe of the smaller diameter is used for 18 hours. Only half of the pool is filled. How long would each pipe take to fill the swimming pool.

A firm manufactures PVC pipes in three plants viz, X ,Y and Z . The deily production velumes from the three firms X,Y and Z are respectively 2000 units , 3000 units and 5000 units . It is known from the past experience that 3% of the output from plant X, 4% from plant Y and 2% from plant Z are defective A pipe is selected at random from a day's total production , if the selected pipe is a defective , then what is the probability that it was produced by plant Y ?

A good application of Plastic is the use of-----

Which of these is not a property of plastics?