Practice Test


1) Arne Wilhelm Kaurin Tiselius made electrophoresis a very powerful technique for studing mixtures of


2) A boundry separating two phases is called


3) Which of the following statement is NOT correct regarding the adsorption of a gas on the surface of the solid?


4) Adsorption is multilayer in case of______ adsorption.


5) The extent of physical adsorption increases with


6) Which one of the following statements is wrong?


7) Chemical adsorption


8) ______ is defined as the phenomenon of accumulation of molecules of one substance on the active surface of other substance due to unbalanced forces of attraction.


9) The substance which has a tendency to adsorb the molecules of other substance on the surface of it is called


10) Which of the following is an example of endothermic reaction?


11) _______ is the process in which adsorbate molecules are held on the adsorbent by chemical bonds.


12) The extent of physical adsorption


13) In physical adsorption, gas molecules are bound on the solid surface by


14) Physical adsorption occurs rapidly at______ temperature


15) Which one of the following is a property of physisorption?


16) Chemisorption was first considered by


17) What is true about chemical adsorption


18) Which of the following is NOT applicable to chemisorption?


19) The relationship between equilibrium pressure of a gas and its amount adsorbed on the solid adsorbent at constant temperature is called


20) The curve showing the variation of adsorption with pressure at constant temperature is called


21) Freundlich isotherm equation is not applicable at


22) Homogeneous catalysis implies that


23) A catalyst in the finely divided state is more efficient because in this state


24) Which is the characteristic of a catalyst?


25) Pick out the correct statement


26) Reaction catalyzed by heterogeneous catalysts are called


27) Which of the following catalysis can be explained by the adsorption theory?


28) The substance which do not act as catalyst but increase the activity of the catalyst are called


29) Enzymes are


30) One molecule of most of the enzymes acts on_______ reactant molecules per second.


31) Addition of 2% ethanol in chloroform when used as anaesthetic, there ethanol acts as


32) Identify the correct statement


33) Colloidal solutions are


34) The phase in which the Colloidal particles are dispersed is known as


35) Colloidal particles possess the remarkable property of adsorption which is due to


36) Electrophoresis is the migration of Colloidal particle under the influence of


37) The movement of Colloidal particles is


38) Which one of the following is NOT Colloidal in nature?


39) In lyophobic sols


40) The zig - zag movement of the Colloidal particles in a Colloidal sol was observed by


41) The zig - zag movement of the Colloidal particles in a Colloidal sol is due to


42) The stability of lyophobic colloids is due to


43) The charge on the colloidal particle can be determined by


44) Tyndall effect is shown by


45) In which one of the following properties, emulsion differ from Colloidal sols ?


46) Mist is an example of Colloidal system of


47) The ability of ion to bring about coagulation of a given Colloidal solution depends upon


48) When a Colloidal solution is observed under ultra microscope we can see


49) The number of phases in Colloidal system are


50) Which is NOT a Colloidal solution of gas in lliquid?


51) The dispersed phase in milk is


52) Which of the following is an example of Solid - Solid system ?


53) The word colloid was introduced by


54) The main difference between crystalloids and Colloids is that of


55) Smoke is an example for


56) Colloidal system of a liquid or solid dispersed in a gaseous dispersion medium is called


57) How many Colloidal system are possible?


58) When sand is stirred into water, the mixture so obtained is a


59) Clouds represent an example of dispersion of


60) Colloidal particles in a dispersion medium form


61) Coagulation of sol takes place


62) Which type of colloid is air?


63) Colloidal system of a liquid dispersed in a liquid medium is called


64) One significant difference between true solutions and colloidal suspension is that colloidal suspensions


65) Which of the following is NOT an example of macromolecular colloidal particles?


66) In case of lyophilic sol, the surface tension of the sol is


67) Lyophilic sols are more stable than lyophobic sols because


68) Which one of this is a lyophilic sol?


69) An emulsion is a dispersion of a


70) ______ is the example of oil in water emulsion


71) Water-loving colloids are called


72) An example of emulsion is


73) Hardy-Schulze law may be expressed as


74) Brownian movement is due to


75) In which of the following is Tyndall effect not observed?


76) Colloidal particles exibit Tyndall effect due to


77) Which of the following indicates the charge on colloidal particles?


78) Tyndall effect would be observed in a


79) Brownian motion shown by colloidal particle is its ________ property.


80) The random motion of colloidal particles in the dispersion medium is referred to as


81) In the adsorption of oxalic acid by activated charcoal, the activated charcoal is known as


82) How many layers are adsorbed in chemical adsorption?


83) Chloroform on oxidation by air forms


84) Which of the following is NOT a colloid?


85) Butter represents colloidal solution of


86) Sky looks blue due to


87) Which one of the following statements is wrong about physical adsorption?


88) Which of the following statements is NOT correct regarding chemical adsorption?


89) The gas which is adsorbed in minimum amount by activated charcoal is


90) Which of the following is neither an example of physical adsorption nor chemical adsorption?


91) Which of the following is an example of chemical Adsorption?


92) The heat of chemisorption is______


93) Freundlich's asorption isotherm is given by


94) Straight line in Freundlich adsorption isotherm is obtained on plotting a graph of


95) Adsorption at low pressure, according to Freundlich adsorption isotherm is proportional to


96) Enzymes have high molecular mass ranging between


97) During hydrogenation of oils, which one of the following catalyst is used?


98) In chemical reaction, catalyst


99) Identify the incorrect statement :