  Low mass ratio contact binary systems are more likely to have unstable orbits
and potentially merge. In addition, such systems exhibit characteristics such
as starspots and high energy emissions (UV) suggestive of chromospheric and
magnetic activity. Light curve modelling of ten contact binary systems is
reported. All were found to be of extreme low mass ratio ranging from 0.122 to
0.24 and three were found to be potentially unstable and possible merger
candidates. Filling of the infrared Calcium absorption lines is a marker of
increased chromospheric activity. We use the available LAMOST spectra along
with matched standard spectra (broadened for rotation) to measure the excess
filling of the central core depression flux of the two main infrared Calcium
absorption lines at 8542 and 8662 angstroms. We find that all reported contact
binaries have excess filling of the core flux in the infrared Calcium lines.
Three of the systems reported were also observed by the GALEX mission and we
find that all three have features of excess ultraviolet emissions further
adding evidence for increased chromospheric activity in low mass ratio contact
binaries. Analysis of both orbital stability and absorption line filling is
dependent on the determination of geometric and absolute parameters from light
curve modelling. Not an insignificant number of contact binary light curves
exhibit the O'Connell effect, usually attributed to starspots. We discuss the
inclusion of starspots in light curve solutions and how they influence the
geometric and absolute parameters
