Question

which of the following statements best describes the change depicted in Figure P1.4?

Answer 1

As you can see in the picture, there are two substances represented by the two colors of the molecules. At first, they occur as gaseous elements. The right picture shows that the red molecules became more compact, conforming to the arrangement of the solid. The blue molecules became relatively nearer to each other. So, one substance become liquid, and the other became solid. Thus, the answer is letter D.

Answer 2

Answer : The correct option is (C)

Explanation :

Condensation : It is a type of process in which the phase changes from gaseous state to liquid state at constant temperature. In this process, there is some intermolecular space present between the atoms of molecule.

Deposition : It is a type of process in which the phase changes from gaseous state to solid state without passing through the liquid state at constant temperature. Or we can say that in deposition process, the molecules are settle down at the bottom of the container. In this process, there is no intermolecular space present between the atoms of molecule.

From the given image we conclude that a mixture of two gaseous elements undergoes deposition because in first image, both the elements (red and blue) present in gaseous phase but in second image, red elements have no intermolecular space between them and they are settling down at the bottom that means deposition occurs.

Hence, the correct option is (C)