Multiple choice

Which of the following conditions are required to change a gaseous state of matter into a liquid state?

  1. High temperature<font size="2"> and</font> low pressure

  2. High pressure<font size="2"> </font><font size="2"><font face="Arial" size="2"><font size="2">and</font></font></font> high temperature

  3. Low temperature<font size="2"> </font><font size="2"><font face="Arial" size="2"><font size="2">and</font></font></font> low pressure

  4. Low temperature<font size="2"> </font><font size="2"><font face="Arial" size="2"><font size="2">and</font></font></font> high pressure
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D Correct answer
Explanation

The pressure and temperature conditions determine the state of a substance. A gaseous state of matter can be converted into a liquid state by lowering the temperature and increasing the pressure. Lower temperatue decreases the kinetic energies of the molecules and high pressure brings the particles closer, and the state of the substance changes from gaseous to liquid.

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