A. VERY SHORT ANSWER TYPE QUESTIONS
1. Name any two methods used for separation of substance.
2. How grain seeds are separated from bundles of stalk?
3. How can sand be separated from water ?
4. How does the solubility of a gas change with increase in ti
5. How is a solution nrnn
Answers
Answer:
1) Winnowing And Threshing
2) The process that is used to separate grain from stalks etc. is threshing
3)When sand is added to water it either hangs in the water or forms a layer at the bottom of the container. Sand therefore does not dissolve in water and is insoluble. It is easy to separate sand and water by filtering the mixture. Salt can be separated from a solution through evaporation.
4) Increasing the temperature increases the solubilities of substances. ... But, as the temperature increases, the solubility of a gas in a liquid decreases. As temperature increases, the average kinetic energy of the gas molecules increases.
5) Solutions consist of -Solute and Solvent. ... Solute – The substance which is being dissolved in solvent to form a solution is called a solute. It is present in lesser quantity than solvent in the solution. Solvent – The component of a solution in which solute is being dissolved is called a solvent.
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