Indicate whether each statement is true or false: 

(a) The liquid crystal state is another phase of matter, just like solid, liquid, and gas. 

(b) Liquid crystalline molecules are generally spherical in shape. 

(c) Molecules that exhibit a liquid crystalline phase do so at well-defined temperatures and pressures. 

(d) Molecules that exhibit a liquid crystalline phase show weaker-than-expected intermolecular forces. 

(e) Molecules containing only carbon and hydrogen are likely to form liquid crystalline phases. 

(f) Molecules can exhibit more than one liquid crystalline phase.