Related InterviewSolutions

• A mixture of sulphur and carbon disulphide isA. heterogeneous and shows tyndall effectB. homogeneous and shows tyndall effectC. heterogeneous and does not show tyndall effectD. homogeneous and does not show tyndall effect
• The substance which is in more quantity is known as?A. SolventB. SoluteC. SolutionD. All of the above
• Rusting of an article made up of iron is calledA. corrosion and it is physical as well as a chemical changeB. dissolution and it is a physical changeC. corrosion and it is a chemical changeD. dissolution and it is a chemical chanage
• (a) What mass of potassium chloride would be needed to form a saturated solution in 50 g of water at 298 K ? Given that solubility the salt is 46/100 g at this temperature. (b) What will happen if this solution is cooled ?
• (a) State one property in which a solution of sugar in water resembles a mixture of sugar and sand and one property in which it differs from it. (b) You are given two liquids, on a solution and the other a compound. How will you distinguish the solution from the compound ?
• On heating, calcium carbonate gets converted into calcium oxide and carbon dioxide. (a) Is this a physicl or a chemical change ? (b) Can you prepare one acidic and one basic solution by using the products formed in the above process ? If so, write the chemical equation involved.
• Rusting of an article made up of iron is calledA. corrosion and it is a physical as well as chemical changeB. dissolution and it is a physical changeC. corrosion and it is a chemical changeD. dissolution and it is a chemical change.
• Explain why particles of a colloidal solution do not settle down when left undisturbed while in the case of a suspension, they do.
• What would you observe when : (a) A saturated solution of potassium nitrate prepared at `60^(@)C` is allowed to cool to room temperature ? (b) A mixture of iron filings and sulphur is heated strongly ? (c ) A colloidal solution of starch is passed through an ordinary filter paper ?
• Calculate the mass of potassium sulphate required to prepare its 10 percent (mass percent) solution in 100 g of water.