Molecules with only single bonds...

Question

Molecules with only single bonds do not generally exhibit liquid-crystalline properties because

a) molecules without multiple bonds lack the rigidity necessary for alignment

b) molecules without multiple bonds are too small to exhibit liquid-crystalline properties

c) molecules with only single bonds are gases

d) molecules with only single bonds are too big to exhibit liquid-crystalline properties

e) molecules without multiple bonds lack the flexibility necessary for alignment

Answer 1

A liquid crystal is something that forms a very good ordered structure in the liquid phase.  That needs not only the right attractive properties to align but 'building blocks' that are all the same shape so they fit right.  So that would be A.. rigidity.  

E is the opposite, and would hurt alignment.  D is false, the type of bond has nothing to do with size, C is false.. just think of gasoline, fat, polyethylene.   B is false, actually you need to have a sufficient size, and see D...