6. Are the melting point of ice and freezing point of water different?
7. Why dry ice called so ?
8. Evaporation of a liquid takes place only at a fixed temperature. Do you agree with this statement?why?
11. Give examples of substances which sublime.
Answers
Answer:
6. true
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Explanation:
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Answer:
The freezing point of water is the same as the melting point of ice: 32°F (0°C
Dry ice is the solid form of carbon dioxide (CO2). It's called "dry ice" because it does not melt like wet ice. Instead, dry ice converts into carbon dioxide gas.
No, evaporation does not occur at a fixed temperature. if this happens, it is called boiling. Evaporation of a liquid occurs at any temperature below its boiling point.
Familiar substances that sublime readily include iodine (shown below), dry ice (shown below), menthol, and camphor. Sublimation is occasionally used in the laboratory as a method for purification of solids, for example, with caffeine.
Explanation:
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