Q. no. 2) One word in the following statements is wrong. correct it and rewrite the statements :( 1) Boiling of water means sublimation. (2) Each substance has a specific condensation point which is the same as its melting point . (3) Sand is melted to make wax. (4) To check weather the white powder, we use the property of hardness as a confirmatory test. (5) Upon heating the crystals of Iodine convert into liquid. (6) Liquids flow downwards from the slope. This property is called transparency.
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Answer:
When a liquid is heated, it eventually reaches a temperature at which the vapor pressure is large enough that bubbles form inside the body of the liquid. This temperature is called the boiling point. Once the liquid starts to boil, the temperature remains constant until all of the liquid has been converted to a gas. (Liquid<-> vapour).
Pure, crystalline solids have a characteristic melting point, the temperature at which the solid melts to become a liquid. (solid<-> liquid).
Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase. (solid<->vapour)
The saturation solution is the solution in which no more solute can be dissolved in a solvent. (solute(s) <-> solute(solution)) ......
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