Indicate whether each statement is true or false: (a) The liqu...

Question

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. (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.

Accepted Answer

Step 1: Understand the concept of liquid crystals. Liquid crystals are a state of matter that have properties between those of conventional liquids and solid crystals. They can flow like a liquid but have some degree of order like a solid.. Step 2: Evaluate statement (a). Liquid crystals are indeed considered another phase of matter, distinct from solid, liquid, and gas. This statement is true.. Step 3: Evaluate statement (b). Liquid crystalline molecules are typically not spherical; they are often elongated or rod-like, which allows them to align in a specific direction. This statement is false.. Step 4: Evaluate statement (d). Molecules that exhibit a liquid crystalline phase often have strong intermolecular forces that allow them to maintain some order while still flowing. This statement is false.. Step 5: Evaluate statement (f). Molecules can exhibit more than one liquid crystalline phase, such as nematic, smectic, and cholesteric phases, depending on temperature and molecular structure. This statement is true.

Risposta video verificata per un problema simile:

Concetti chiave

Liquid Crystals

Molecular Shape and Structure

Intermolecular Forces