JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Sample Paper

done Topic Test - Surface Chemistry Total Questions - 35    [Download]

• question_answer1)
  Chemisorption
  A)
  Involves the weak attractive interactions between adsorbent and adsorbate
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  B)
  Is irreversible in nature
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  C)
  Decreases with increase of temperature
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  D)
  Involves multilayer formation of adsorbent on adsorbate
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• question_answer2)
  Which one of the following statement is not correct?
  A)
  The extent of adsorption depends on the nature of the adsorbent and adsorbate
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  B)
  The extent of adsorption depends on the pressure of the gas
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  C)
  The extent of adsorption depends on the temperature
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  D)
  The extent of adsorption has no upper limit Not Available Solution Available Solution
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• question_answer3)
  Which of the following kinds of catalysis can be explained by the adsorption theory?   
  A)
  Homogeneous catalysis   
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  B)
  Acid base catalysis
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  C)
  Heterogeneous catalysis  
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  D)
  Enzyme catalysis
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• question_answer4)
  In Haber's process for the manufacture of ammonia
  A)
  Finely divided iron is used as catalyst
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  B)
  Finely divided molybdenum is used as catalyst
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  C)
  Finely divided nickel is used as catalyst
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  D)
  No catalyst is necessary
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• question_answer5)
  Which one of the following statement is wrong in case of enzyme catalysis?
  A)
  Enzymes work best at an optimum temperature
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  B)
  Enzymes work at an optimum \[pH\]
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  C)
  Enzymes are highly specific for substances
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  D)
  An enzyme raises activation energy
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• question_answer6)
  Which of the statement is wrong among the following
  A)
  Haber's process of \[N{{H}_{3}}\] requires iron as catalyst
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  B)
  Friedel-Craft's reaction uses anhydrous \[AlC{{l}_{3}}\]
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  C)
  Hydrogenation of oils uses iron as catalyst
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  D)
  Oxidation of \[S{{O}_{2}}\] to \[S{{O}_{3}}\] requires \[{{V}_{2}}{{O}_{5}}\]
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• question_answer7)
  Catalyst used in the oxidation of \[S{{O}_{2}}\to S{{O}_{3}}\]
  A)
  Nickel               
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  B)
  \[ZnO.C{{r}_{2}}{{O}_{3}}\]
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  C)
  \[{{V}_{2}}{{O}_{5}}\]          
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  D)
  Iron
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• question_answer8)
  Ferric hydroxide sol is positively charged colloid. The coagulating power of \[NO_{3}^{-},\,SO_{4}^{2-}\] and \[PO_{4}^{3-}\] ions would be in the order
  A)
  \[NO_{3}^{-}>SO_{4}^{2-}>PO_{4}^{3-}\]
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  B)
  \[SO_{4}^{2-}>NO_{3}^{-}>PO_{4}^{3-}\]
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  C)
  \[PO_{4}^{3-}>SO_{4}^{2-}>NO_{3}^{-}\]
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  D)
  \[NO_{3}^{-}=SO_{4}^{2-}=PO_{4}^{3-}\]
  done clear
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• question_answer9)
  Which of the following will have highest coagulating power for \[A{{s}_{2}}{{S}_{3}}\] colloid
  A)
  \[PO_{4}^{-3}\]                      
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  B)
  \[SO_{4}^{-2}\]
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  C)
  \[N{{a}^{+}}\]                       
  done clear
  D)
  \[A{{l}^{3+}}\]
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• question_answer10)
  Which of the following reactions leads to the formation of a substance in the colloidal state
  A)
  \[Cu+HgC{{l}_{2}}\to CuC{{l}_{2}}+Hg\]
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  B)
  \[2HN{{O}_{3}}+3{{H}_{2}}S\to 3S+4{{H}_{2}}O+2NO\]
  done clear
  C)
  \[2Mg+C{{O}_{2}}\to 2MgO+C\]
  done clear
  D)
  \[Cu+CuC{{l}_{2}}\to C{{u}_{2}}C{{l}_{2}}\]
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• question_answer11)
  Butter is
  A)
  A gel                            
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  B)
  An emulsion
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  C)
  A sol    
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  D)
  Not a colloid
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• question_answer12)
  Pick out the statement which is not relevant in the discussion of colloids                    
  A)
  Sodium aluminium silicate is used in the softening of hard water
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  B)
  Potash alum is used in shaving rounds and as antiseptic in medicine
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  C)
  Artificial rain is caused by throwing electrified sand on the clouds from an aeroplane 
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  D)
  Deltas are formed at a place where the river pours its water into the sea
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• question_answer13)
  Milk is  
  A)
  Dispersed fats in oil                    
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  B)
  Dispersed fats in water
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  C)
  Dispersed water in fats                
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  D)
  Dispersed water in oil
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• question_answer14)
  The decomposition of \[{{H}_{2}}{{O}_{2}}\] can be slowed down by the addition of small amount of phosphoric acid which act as
  A)
  Promoter                      
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  B)
  Inhibitor
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  C)
  Detainer            
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  D)
  Stopper
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• question_answer15)
  The impurities present in rain water possess .............. charge
  A)
  Positive            
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  B)
  Negative
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  C)
  Zero                             
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  D)
  Positive and negative
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• question_answer16)
  If gold number of A,B,C and D are 0.005, 0.05, 0.5 and 5 respectively, then which of the following will have the highest protective power   
  A)
  A                                 
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  B)
  B
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  C)
  C                                 
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  D)
  D
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• question_answer17)
  Fog is a colloidal solution of        
  A)
  Solid in gas                   
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  B)
  Liquid in gas
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  C)
  Gas in liquid                  
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  D)
  Gas in solid
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• question_answer18)
  Point out the wrong statement : Physical adsorption is characterised by
  A)
  Attraction due to weak Vander Waal's forces
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  B)
  Irreversible nature of adsorption
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  C)
  Multimolecular adsorption layers
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  D)
  Decrease in adsorption with increase in temperature
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• question_answer19)
  In Freundlich adsorption, isotherm adsorption is proportional to pressure P as             
  A)
  \[{{P}^{0}}\]                          
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  B)
  \[P\]
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  C)
  \[{{P}^{n}}\]                          
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  D)
  \[{{P}^{1/n}}\]
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• question_answer20)
  The equation for Freundlich adsorption isotherm is
  A)
  \[\frac{x}{m}=k{{p}^{1/n}}\]             
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  B)
  \[x=mk{{p}^{1/n}}\]
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  C)
  \[x/m=k{{p}^{-n}}\]               
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  D)
  All of these
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• question_answer21)
  In the following reaction the catalyst used is
  A)
  \[A{{l}_{2}}{{O}_{3}}\]                      
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  B)
  \[C{{r}_{2}}{{O}_{3}}\]
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  C)
  \[C{{r}_{2}}{{O}_{3}}\] and \[A{{l}_{2}}{{O}_{3}}\] 
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  D)
  Zn dust
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• question_answer22)
  Regarding criteria of catalysis which one of the following statements is not true           
  A)
  The catalyst is unchanged chemically at the end of the reaction
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  B)
  A small quantity of catalyst is often sufficient to bring about a considerable amount of reaction
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  C)
  In a reversible reaction the catalyst alters the equilibrium position
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  D)
  The catalyst accelerates the reaction
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• question_answer23)
  Amongst the following chemical reactions, the one representing homogeneous catalysis is
  A)
  \[{{N}_{2}}(g)+3{{H}_{2}}(g)\xrightarrow{Fe}2N{{H}_{3}}(g)\]
  done clear
  B)
  \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\xrightarrow{2NO}2S{{O}_{3}}(g)+2NO(g)\]
  done clear
  C)
  \[CO(g)+3{{H}_{2}}(g)\xrightarrow{Ni}C{{H}_{4}}(g)+{{H}_{2}}O\]
  done clear
  D)
  \[2S{{O}_{2}}(g)+{{O}_{2}}(g)\xrightarrow{{{V}_{2}}{{O}_{5}}}2S{{O}_{3}}(g)\]
  done clear
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• question_answer24)
  Enzyme activity is maximum at
  A)
  300 K               
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  B)
  310 K
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  C)
  320 K               
  done clear
  D)
  330 K
  done clear
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• question_answer25)
  Which of the following statements is not true for a lyophobic sol
  A)
  It can be easily solvated
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  B)
  It carries charge
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  C)
  The coagulation of this sol is irreversible in nature
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  D)
  It is less stable in a solvent
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• question_answer26)
  Milk is a colloid in which
  A)
  A liquid is dispersed in liquid
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  B)
  A solid is dispersed in liquid
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  C)
  A gas is dispersed in liquid
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  D)
  Some suger is dispersed in water
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• question_answer27)
  Which is a natural colloidal
  A)
  Sodium chloride 
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  B)
  Urea
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  C)
  Canesugar                     
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  D)
  Blood
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• question_answer28)
  Which of the following pairs of ions would be expected to form precipitate when their dilute solution are mixed
  A)
  \[N{{a}^{+}},\,SO_{3}^{2-}\]                       
  done clear
  B)
  \[NH_{4}^{+},\,CO_{3}^{2-}\]
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  C)
  \[N{{a}^{+}},\,{{S}^{-2}}\]            
  done clear
  D)
  \[F{{e}^{+3}},\,PO_{4}^{-3}\]
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• question_answer29)
  In which of the following Tyndall effect is not observed
  A)
  Suspensions                  
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  B)
  Emulsions
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  C)
  Sugar solution   
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  D)
  Gold sol
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• question_answer30)
  When a strong beam of light is passed through a colloidal solution, the light will          
  A)
  Give a rainbow
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  B)
  Be scattered
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  C)
  Be reflected
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  D)
  Absorbed completely
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• question_answer31)
  Which one is an example of miceller system
  A)
  Soap + water    
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  B)
  Protein + water
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  C)
  Rubber + benzene          
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  D)
  \[A{{s}_{2}}{{O}_{3}}+Fe{{(OH)}_{3}}\]
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• question_answer32)
  Which one is Freundlich's equation
  A)
  \[\frac{x}{m}=\log \,K+\frac{1}{n}\log \,P\]       
  done clear
  B)
  \[\frac{x}{m}=\exp \,(-KP)\]
  done clear
  C)
  \[\frac{x}{m}=K{{P}^{2}}\]               
  done clear
  D)
  \[\log \frac{x}{m}=\log K+\frac{1}{n}\log \,C\]
  done clear
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• question_answer33)
  At isoelectric point
  A)
  Colloidal sol becomes highly stable
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  B)
  Precipitation of a colloidal sol takes place
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  C)
  Colloidal particles becomes uncharged
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  D)
  Peptization can be carried out
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• question_answer34)
  Gold sol is an electronegative sol. The amount of electrolyte required to coagulate a certain amount of gold sol is minimum in the case of        
  A)
  \[CaC{{l}_{2}}\]                      
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  B)
  \[NaCl\]
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  C)
  \[AlC{{l}_{3}}\]                       
  done clear
  D)
  \[N{{a}_{2}}S{{O}_{4}}\]
  done clear
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• question_answer35)
  The surface tension of which of the following liquid is maximum?
  A)
  \[{{H}_{2}}O\]            
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  B)
  \[{{C}_{6}}{{H}_{6}}\]
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  C)
  \[C{{H}_{3}}OH\]                   
  done clear
  D)
  \[{{C}_{2}}{{H}_{5}}OH\]
  done clear
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