14. In chromatography, the component which he
more affinity for the stationary phase appears at the
of the paper.
15. Which property of german silver makes it useful for
making imitation jewellery?
16. The kinetic energy of the molecules is
solids than in liquids.
17. State one property of germanium which shows its
acidic nature.
18. Certain gases dissolve in water by the process of
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The solid-vapor curve, labeled AB in Figure 2, indicates the temperatures and pressures at which ice and water vapor are in equilibrium. These temperature-pressure data pairs correspond to the sublimation, or deposition, points for water. If we could zoom in on the solid-gas line in Figure 2, we would see that ice has a vapor pressure of about 0.20 kPa at −10 °C. Thus, if we place a frozen sample in a vacuum with a pressure less than 0.20 kPa, ice will sublime. This is the basis for the “freeze-drying” process often used to preserve foods, such as the ice cream shown in Figure 3.
Explanation:
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