Related InterviewSolutions

• Classify the following into elements, compounds and mixtures. (a) Sodium (b) Soil (c ) Sugar solution (d) Silver (e ) Calcium carbonate (f) Tin (g) Silicon (h) Coal (i) Air (j) Soap (k) Methane (l) Carbon dioxide (m) Blood
• Which of the following will show "Tyndall effect "? (a) Salt solution (b) Milk (c ) Copper sulphate solution (d) Starch solution.
• Which of the following are chemical changes ? (a) Growth of a plant (b) Rusting of iron (c ) Mixing of iron filings and sand (d) Cooking of food (e ) Digestion of food (f) Freezing of water (g) Burning of a candle
• Nickel coin is an example of ?A. Liquid solutionB. Solid solutionC. Gaseous solutionD. None of the Above
• The solution in which solvent is water is known as?A. Aqueous solutionB. Non Aqueous solutionC. No solutionD. None of the Above
• In liquid solutions which acts as the solvent?A. SolidB. GasC. LiquidD. All of the above
• In which mixture a precipitate is formed?A. SuspensionB. ColloidC. SolutionD. All of the above
• A saturated solution becomes unsaturated on ?A. HeatingB. FreezingC. MeltingD. None of the Above
• Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution). (a) What mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K ? (b) Pragya makes a saturated solution of potassium chloride in water at 353 K and leaves the solution to cool at room temperature. What would she observe as the solution cools ? Explain. (c ) Find the solubility of each salt at 293 K . Which salt has the highest solubility at this temperature ? (d) What is the effect of change of temperature on the solubility of a salt ?