the most appropriate

kinetic energy gof molecules at roomtemprature gis miniuum in

  1. wood
  2. alcohol
  3. helium
  4. carbon dioxide

The correct answer is 1) wood. This is because wood is a solid, while helium and carbon dioxide are gases and alcohol is a liquid. We know that inter-particles spaces are minimum in solids and maximum in gases. Thus, particles in a solid are closely packed and hence do not move freely. So, the kinetic energy of molecules at room temperature is minimum in wood (a solid). 

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