Which one of the following is not an example of a condensation polymer?
(1) Terylene
(2) Nylon 6,6
(3) Bakelite
(4) Polystyrene
Polystyrene
Polystyrene is a polymer formed by the addition polymerization of styrene monomers. It does not involve the elimination of small molecules like water, which is characteristic of condensation polymers. In contrast, Terylene, Nylon 6,6, and Bakelite are all examples of condensation polymers.
Given below are two statements regarding conformations of n-butane. Choose the correct option. 
Consider a weak base \(B\) of \(pK_b = 5.699\). \(x\) mL of \(0.02\) M HCl and \(y\) mL of \(0.02\) M weak base \(B\) are mixed to make \(100\) mL of a buffer of pH \(=9\) at \(25^\circ\text{C}\). The values of \(x\) and \(y\) respectively are