Which of the following statements about matter is not correct?

Analyze the question: We need the statement that is NOT correct (the false one) about the states of matter.

Concept: The kinetic theory of matter:

• Solids: molecules are very closely packed, held by strong intermolecular forces, and can only vibrate about fixed positions.
• Liquids: molecules are close but not fixed, so they can slide past each other and move within the liquid.
• Gases: molecules are far apart, with very weak forces, and move most freely and randomly.

Freedom of movement increases in the order: solid < liquid < gas.

Check each option:

• A. "Molecules of solids move more freely than molecules of liquids and gases." This is false. Solid molecules move the least freely because they only vibrate in fixed positions. Liquids and gases move more freely.
• B. "Molecules of solids are more closely packed than those of liquids." This is true. Solids are generally the most tightly packed.
• C. "Energy is required to break the intermolecular forces of attraction." This is true. This is why latent heat is needed for melting and boiling.
• D. "Molecules of liquids move about within the liquid and they are in constant motion." This is true, since liquid molecules are always in random motion.

Tip: For "which is NOT correct" questions, look for statements that reverse a known trend. Remember that freedom of molecular movement goes gas > liquid > solid. Any option claiming solids move more freely is a red flag.