01Medium63×since 2002Q2235Among the following, correct statement is :ABrownian movement is more pronounced for smaller particles than for bigger–particlesBSols of metal sulphides are lyophilic.CHardy Schulze law states that bigger the size of the ions, the greater is its coagulating power.DOne would expect charcoal to adsorb chlorine more than hydrogen sulphide.Check answerSkip
02Easy63×since 2002Q2236Which of the following statements about colloids is False ?AFreezing point of colloidal solution is lower than true solution at same concentration of a solute.BColloidal particles can pass through ordinary filter paper.CWhen silver nitrate solution is added to potassium iodide solution, a negatively charged colloidal solution is formed.DWhen excess of electolyte is added to colloidal solution, colloidal particle will be precipitated.Check answerSkip
03Easy63×since 2002Q2237Among the colloids cheese (C), milk (M), and smoke (S), the correct combination of the dispersed phase and dispersion medium, respectively is :AC : liquid in solid ; M : liquid in liquid ; S : solid in gasBC : liquid in solid ; M : liquid in solid ; S : solid in gasCC : solid in liquid ; M : liquid in liquid ; S : gas in solidDC : solid in liqid ; M : solid in liquid ; S : solid in gasCheck answerSkip
04Easy63×since 2002Q2238Among the following, the INCORRECT statement about colloids is :AThe range of diameters of colloidal particles is between 1 and to 1000 nmBthey are larger than small molecules and have high molar massCThey can scatter lightDThe osmotic pressure of a colloidal solution is of higher order than the true solution at the same concentration.Check answerSkip
05Easy63×since 2002Q2239Peptization is a :Aprocess of converting soluble particles to form colloidal solutionBprocess of converting precipitate into colloidal solutionCprocess of bringing colloidal molecule into solutionDprocess of converting a colloidal solution into precipitateCheck answerSkip
06Easy63×since 2002Q2240The correct option among the following is :AAddition of alum to water makes it unfit for drinking.BColloidal medicines are more effective because they have small surface area.CColloidal paraticles in lyophobic sols can be precipitated by electrophoresis.DBrownian motion in colloidal solution is faster if the viscosity of the solution is very high.Check answerSkip
07Easy63×since 2002Q2241The aerosol is a kind of colloid in which :Asolid is dispersed in gasBgas is dispersed in solidCgas is dispersed in liquidDliquid is dispersed in waterCheck answerSkip
08Easy63×since 2002Q2245For coagulation of arsenious sulphate sol, which one of the following salt solution will be most effective ?ABaCl₂BAlCl₃CNaClDNa₃PO₄Check answerSkip
09Medium63×since 2002Q2246As per Hardy-Schulze formulation, the flocculation values of the following for ferric hydroxide sol are in the order :AAICl₃ > K₃[Fe(CN)₆] > K₂CrO₄ > KBr = KNO₃BK₃[Fe(CN)₆] < K₂CrO₄ < KBr = KNO₃ = AlCl₃CK₃[Fe(CN)₆] < K₂CrO₄ < AlCl₃ < KBr < KNO₃DK₃[Fe(CN)₆] > AlCl₃ > K₂CrO₄ > KBr > KNO₃Check answerSkip
10Easy63×since 2002Q2247Kraft temperature is the temperature :Abelow which the aqueous solution of detergents starts freezing.Babove which the formation of micelles takes place.Cbelow which the formation of micelles takes place.Dabove which the aqueous solution of detergents starts boiling.Check answerSkip