AIPMT 2009 Preliminary Mock Test

Structures of some common polymers are given. Which one is not correctly presented?

The ionization constant of ammonium hydroxide is $1.77\times 10^{-5}$ at $298\text{K}$. Hydrolysis constant of ammonium chloride is:

Consider the following reaction:

The product $Z$ is:

The equivalent conductance of $M/32$ solution of a weak monobasic acid is $8.0{\text{mhos cm}}^2$ and at infinite dilution is $400{\text{mhos cm}}^2$. The dissociation constant of this acid is:

The straight chain polymer (silicone) is formed by: