a$.$ Define: stationary phase, mobile phase, $Rf.$

b$.$ What are the mobile and stationary phases used in Part One?

c$.$ What defines the polarity of a material?

d$.$ Why wouldn't you use a pen to label the TLC plates?

e$.$ Why might it be difficult to distinguish cis$-$ and trans$-2-$pentene by TLC$?$

f$.$ What will the result be of spotting too much compound onto the TLC plate?

g$.$ List three safety hazards which should be considered during this experiment.

h$.$ A student develops a TLC plate and visualises a single spot at the origin. They

conclude that it is a single pure compound. Is this conclusion justified? What else

could be done to support$/$disprove their conclusion?