Write the structure and name of the monomer of Nylon-6.
Nylon-6 Monomer: The monomer for Nylon-6 is caprolactam.

The spin-only magnetic moment of \( \text{Cr}^{3+} \) cation is ___________.
The linkage present in Lactose is ___________.
The pH of a 0.001 M HCl solution is ___________