Solved papers for JEE Main & Advanced AIEEE Solved Paper-2004

done AIEEE Solved Paper-2004 Total Questions - 75

• question_answer1) Which of the following sets of quantum numbers is correct for an electron in\[4f\]orbital?
  A)
  \[n=4,l=3,m=+4,s=+1/2\]
  done clear
  B)
  \[n=4,l=4,m=-4,s=-1/2\]
  done clear
  C)
  \[n=4,l=3,m=+1,s=+1/2\]
  done clear
  D)
  \[n=3,l=2,m=-2,s=+1/2\]
  done clear
  View Answer play_arrow

• question_answer2) Consider the ground state of\[Cr\]atom\[(Z=24)\]. The numbers of electrons with the azimuthal quantum numbers, \[l=1\] and 2 are, respectively
  A)
  12 and 4              
  done clear
  B)
         12 and 5              
  done clear
  C)
         16 and 4              
  done clear
  D)
         16 and 5
  done clear
  View Answer play_arrow

• question_answer3) Which one of the following ions has the highest value of ionic radius?
  A)
  \[L{{i}^{+}}\]                     
  done clear
  B)
         \[{{B}^{3+}}\]                   
  done clear
  C)
  \[{{O}^{2-}}\]                    
  done clear
  D)
         \[{{F}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer4) The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant\[=1.097\times {{10}^{7}}\text{ }{{m}^{-1}})\]
  A)
  91 nm   
  done clear
  B)
         192nm 
  done clear
  C)
         406 nm
  done clear
  D)
         \[9.1\times {{10}^{-8}}nm\]
  done clear
  View Answer play_arrow

• question_answer5) The correct order of bond angles (smallest first) in\[{{H}_{2}}S,N{{H}_{3}},B{{F}_{3}}\]and\[Si{{H}_{4}}\]is
  A)
  \[{{H}_{2}}S<Si{{H}_{4}}<N{{H}_{3}}<B{{F}_{3}}\]
  done clear
  B)
  \[N{{H}_{3}}<{{H}_{2}}S<Si{{H}_{4}}<B{{F}_{3}}\]
  done clear
  C)
  \[{{H}_{2}}S<N{{H}_{3}}<Si{{H}_{4}}<B{{F}_{3}}\]
  done clear
  D)
  \[{{H}_{2}}S<N{{H}_{3}}<B{{F}_{3}}<Si{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer6) Which one of the following sets of ions represents the collection of isoelectronic species? (At.\[nos.\,F=9,Cl=17,Na=11,Mg=12,\] \[Al=13,K=19,Ca=20,Sc=21)\]
  A)
  \[{{K}^{+}},C{{a}^{2+}},S{{c}^{3+}},C{{l}^{-}}\]
  done clear
  B)
  \[N{{a}^{+}},C{{a}^{2+}},S{{c}^{3+}},{{F}^{-}}\]
  done clear
  C)
  \[{{K}^{+}},C{{l}^{-}},M{{g}^{2+}},S{{c}^{3+}}\]
  done clear
  D)
  \[N{{a}^{+}},M{{g}^{2+}},A{{l}^{3+}},C{{l}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer7) Among \[A{{l}_{2}}{{O}_{3}},Si{{O}_{2}},{{P}_{2}}{{O}_{3}}\]and \[S{{O}_{2}},\]the correct order of acid strength is
  A)
  \[S{{O}_{2}}<{{P}_{2}}{{O}_{3}}<Si{{O}_{2}}<A{{l}_{2}}{{O}_{3}}\]
  done clear
  B)
  \[Si{{O}_{2}}<S{{O}_{2}}<A{{l}_{2}}{{O}_{3}}<{{P}_{2}}{{O}_{3}}\]
  done clear
  C)
  \[A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<S{{O}_{2}}<{{P}_{2}}{{O}_{3}}\]
  done clear
  D)
  \[A{{l}_{2}}{{O}_{3}}<Si{{O}_{2}}<{{P}_{2}}{{O}_{3}}<S{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer8) The bond order in NO is 2.5 while that in \[N{{O}^{+}}\]is 3. Which of the following statements is true for these two species?
  A)
  Bond length in\[N{{O}^{+}}\]is greater than in\[NO\]
  done clear
  B)
  Bond length in\[NO\]is greater than in\[N{{O}^{+}}\]
  done clear
  C)
  Bond length in\[N{{O}^{+}}\]is equal to that in\[NO\]
  done clear
  D)
  Bond length is unpredictable
  done clear
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• question_answer9) The formation of the oxide ion\[{{O}^{2-}}(g)\]requires first an exothermic and then an exothermic step as shown below \[O(g)+{{e}^{-}}={{O}^{-}}(g);\]                 \[\Delta {{H}^{o}}=-142\,kJ\,mo{{l}^{-1}}\] \[{{O}^{-}}{{(g)}^{-}}+{{e}^{-}}={{O}^{2}}(g);\]   \[\Delta {{H}^{o}}=844\,kJ\,mo{{l}^{-1}}\] This is because
  A)
  oxygen is more electronegative
  done clear
  B)
  oxygen has high electron affinity
  done clear
  C)
  \[{{O}^{-}}\]ion will tend to resist the addition of another electron  
  done clear
  D)
  \[{{O}^{-}}\]ion has comparatively larger size than oxygen atom
  done clear
  View Answer play_arrow

• question_answer10) The states of Hybridisation of boron and oxygen atoms in boric acid\[({{H}_{3}}B{{O}_{3}})\]are respectively            
  A)
  \[s{{p}^{2}}\]and\[s{{p}^{2}}\] 
  done clear
  B)
         \[s{{p}^{2}}\]and\[s{{p}^{3}}\] 
  done clear
  C)
         \[s{{p}^{3}}\]and \[s{{p}^{2}}\]       
  done clear
  D)
         \[s{{p}^{3}}\]and\[s{{p}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer11) Which one of the following has the regular tetrahedral structure? (At. nos.\[B=5,S=16,Ni=28,\text{ }Xe=54\])
  A)
  \[Xe{{F}_{4}}\]                 
  done clear
  B)
         \[S{{F}_{4}}\]    
  done clear
  C)
         \[BF_{4}^{-}\]   
  done clear
  D)
         \[{{[Ni{{(CN)}_{4}}]}^{2-}}\]
  done clear
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• question_answer12) Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one of them?
  A)
  \[(n-1){{d}^{8}}n{{s}^{2}}\]        
  done clear
  B)
         \[(n-1){{d}^{5}}n{{s}^{1}}\]                        
  done clear
  C)
  \[(n-1){{d}^{3}}n{{s}^{2}}\]        
  done clear
  D)
         \[(n-1){{d}^{5}}n{{s}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer13) As the temperature is raised from\[20{}^\circ C\]to \[40{}^\circ C,\]the average kinetic energy of neon atoms changes by a factor of which of the following?
  A)
  1/2                        
  done clear
  B)
         \[\sqrt{313/293}\]          
  done clear
  C)
         313/293          
  done clear
  D)
         2
  done clear
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• question_answer14) The maximum number of\[90{}^\circ \]angles between bond pair-bond pair of electrons is observed in
  A)
  \[ds{{p}^{3}}\]hybridisation       
  done clear
  B)
  \[s{{p}^{3}}{{d}^{2}}\]hybrfdisation
  done clear
  C)
  \[ds{{p}^{2}}\]hybridisation 
  done clear
  D)
  \[s{{p}^{3}}d\]hybridisation
  done clear
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• question_answer15) Which one of the following aqueous solutions will exhibit highest boiling point?
  A)
  \[0.01\text{ }M\text{ }N{{a}_{2}}S{{O}_{4}}\]
  done clear
  B)
         \[0.01\text{ }M\text{ }KN{{O}_{3}}\]
  done clear
  C)
                         \[0.015\text{ }M\] urea    
  done clear
  D)
        0.015 M glucose
  done clear
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• question_answer16) Which among the following factors is the most important in making fluorine the strongest oxidizing agent?
  A)
  Electron affinity
  done clear
  B)
  lonisation enthalpy
  done clear
  C)
  Hydration enthalpy
  done clear
  D)
  Bond dissociation energy
  done clear
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• question_answer17) In van der Waals' equation of state of the gas law, the constant 'b' is a measure of
  A)
  intermolecular repulsions
  done clear
  B)
  intermolecular attraction
  done clear
  C)
  volume occupied by the molecules
  done clear
  D)
  intermolecular collisions per unit volume
  done clear
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• question_answer18) The conjugate base of\[{{H}_{2}}PO_{4}^{-}\]is
  A)
  \[PO_{4}^{3-}\]
  done clear
  B)
                                         \[{{P}_{2}}{{O}_{5}}\]                    
  done clear
  C)
         \[{{H}_{3}}P{{O}_{4}}\]          
  done clear
  D)
         \[HPO_{4}^{2-}\]
  done clear
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• question_answer19) \[6.02\times {{10}^{20}}\]molecules of urea are present in  100 mL of its solution. The concentration of urea solution is (Avogadro constant, \[{{N}_{A}}\,=6.02\,\times {{10}^{23}}\,mo{{l}^{-1}}\])
  A)
  0.001 M         
  done clear
  B)
         0.01 M 
  done clear
  C)
         0.02 M             
  done clear
  D)
         0.1 M
  done clear
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• question_answer20) To neutralize completely 20 mL of 0.1M aqueous solution of phosphorous acid \[({{H}_{3}}P{{O}_{3}}),\]the volume of 0.1M aqueous KOH solution required is
  A)
  10 mL
  done clear
  B)
                         20 mL   
  done clear
  C)
         40 mL   
  done clear
  D)
         60 mL
  done clear
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• question_answer21) For which of the following parameters the structural isomers\[{{C}_{2}}{{H}_{2}}OH\]and\[C{{H}_{3}}OC{{H}_{3}}\] would be expected to have the same values? (Assume ideal behaviour)
  A)
  Heat of vaporization,
  done clear
  B)
  Vapour pressure at the same temperature
  done clear
  C)
  Boiling points
  done clear
  D)
  Gaseous densities at the same temperature and pressure
  done clear
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• question_answer22) Which of the following liquid pairs shows a positive deviation from Raoult's law?
  A)
  Water                   -           hydrochloric acid
  done clear
  B)
  Benzene              -           methanol
  done clear
  C)
  Water                   -           nitric acid
  done clear
  D)
  Acetone               -           chloroform
  done clear
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• question_answer23) Which one of the following statement is false?
  A)
  Raoult?s law states that the vapor pressure of a component over a solution is proportional to its mole fraction
  done clear
  B)
  The osmotic pressure\[(\pi )\]of a solution is given by the equation\[\pi =~MRT,\]where M is the molarity of the solution
  done clear
  C)
  The correct order of osmotic pressure for M aqueous solution of each compound is \[BaC{{l}_{2}}>KCl>C{{H}_{3}}COOH>\]sucrose
  done clear
  D)
  Two sucrose solutions -of same molality prepared in different solvents will have the same freezing point depression
  done clear
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• question_answer24) What type of crystal defect is indicated in the diagram below?\[N{{a}^{+}},C{{l}^{-}},N{{a}^{+}},C{{l}^{-}},N{{a}^{+}},C{{l}^{-}}\] \[C{{l}^{-}}+C{{l}^{-}}N{{a}^{+}}+N{{a}^{+}}\]\[N{{a}^{+}}C{{l}^{-}}+C{{l}^{-}}N{{a}^{+}}C{{l}^{-}}\]\[C{{l}^{-}}N{{a}^{+}}C{{l}^{-}}N{{a}^{+}}+N{{a}^{+}}\]
  A)
  Frenkel defect
  done clear
  B)
  Schottky defect
  done clear
  C)
  Interstitial defect
  done clear
  D)
  Frenkel and Schottky defects
  done clear
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• question_answer25) An ideal gas expands in volume from \[1\times {{10}^{-3}}{{m}^{3}}\]to\[1\times {{10}^{-2}}{{m}^{3}}\]at\[300\text{ }K\]against a constant pressure of\[1\times {{10}^{5}}N{{m}^{-2}}\]. The work done is
  A)
  \[-\text{ }900\text{ }J\]  
  done clear
  B)
                         \[-900\text{ }kJ\]            
  done clear
  C)
         \[270\text{ }kJ\]           
  done clear
  D)
         \[900\text{ }kJ\]
  done clear
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• question_answer26) In  a  hydrogen-oxygen  fuel  cell, combustion of hydrogen occurs to
  A)
  generate heat
  done clear
  B)
  create potential difference between the two electrodes
  done clear
  C)
  produce high purity water
  done clear
  D)
  remove adsorbed oxygen from electrode surfaces
  done clear
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• question_answer27) In a first order reaction, the concentration of the reactant, decreases from 0.8 M to 0,4 M in 15 min, The time taken for the concentration to change from 0.1 M to 0.025 M is
  A)
  30 min                  
  done clear
  B)
  15 min
  done clear
  C)
                         7.5 min           
  done clear
  D)
         60 min
  done clear
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• question_answer28) What is the equilibrium expression for the reaction \[{{P}_{4}}(s)+5{{O}_{2}}(g){{P}_{4}}{{O}_{10}}(s)?\]
  A)
  \[{{K}_{c}}=\frac{[{{P}_{4}}{{O}_{10}}]}{[{{P}_{4}}]{{[{{O}_{2}}]}^{5}}}\]
  done clear
  B)
         \[{{K}_{c}}=\frac{[{{P}_{4}}{{O}_{10}}]}{5[{{P}_{4}}][{{O}_{2}}]}\]
  done clear
  C)
                         \[{{K}_{c}}={{[{{O}_{2}}]}^{5}}\]               
  done clear
  D)
         \[{{K}_{c}}=\frac{1}{{{[{{O}_{2}}]}^{5}}}\]
  done clear
  View Answer play_arrow

• question_answer29) For the reaction, \[CO(g)+C{{l}_{2}}(g)COC{{l}_{2}}(g),\]the\[{{K}_{p}}/{{K}_{c}}\]is equal to
  A)
  \[1/RT\]           
  done clear
  B)
        RT                          
  done clear
  C)
  \[\sqrt{RT}\]             
  done clear
  D)
         1.0
  done clear
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• question_answer30) The equilibrium constant for the reaction \[{{N}_{2}}(g)+{{O}_{2}}(g)2NO(g)\] at temperature T is \[4\times {{10}^{-4}}\]. The value of\[{{K}_{c}}\] for the reaction \[NO(g)\frac{1}{2}{{N}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\]at the same temperature is
  A)
  \[2.5\times {{10}^{2}}\]                
  done clear
  B)
  50                          
  done clear
  C)
         \[4\times {{10}^{-4}}\]         
  done clear
  D)
         0.02
  done clear
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• question_answer31) The rate equation for the reaction \[A+B\xrightarrow{{}}C\]is found to be rate\[=k[A][B]\] The correct statement in relation to this reaction is that the
  A)
  unit of k must be\[{{s}^{-1}}\]
  done clear
  B)
  \[{{t}_{1/2}}\]is a constant
  done clear
  C)
  rate of formation of C is twice the rate of disappearance of A
  done clear
  D)
  value of k is independent of the initial concentrations of A and B
  done clear
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• question_answer32) Consider the following\[E{}^\circ \]values \[E{{{}^\circ }_{F{{e}^{3+}}/F{{e}^{2+}}}}=+0.77\,V\] \[E{{{}^\circ }_{S{{n}^{2+}}/Sn}}=-0.14\,V\] Under standard conditions the potential for the reaction \[Sn(s)+2F{{e}^{3+}}(aq)\xrightarrow{{}}2F{{e}^{2+}}(aq)\]                                                                 \[+S{{n}^{2+}}(aq)\]is
  A)
  \[1.68V\]            
  done clear
  B)
         \[1.40V\]            
  done clear
  C)
         \[0.91\text{ }V\]             
  done clear
  D)
         \[0.63\text{ }V\]
  done clear
  View Answer play_arrow

• question_answer33) The molar solubility (in\[mol\text{ }{{L}^{-1}}\]) of a sparingly soluble salt\[M{{X}_{4}}\]is 's'. The corresponding solubility product is\[{{K}_{sp}}\]. s as given in terms of \[{{K}_{sp}}\]by the relation
  A)
  \[s={{({{K}_{sp}}/128)}^{1/4}}\]   
  done clear
  B)
         \[s={{(128{{K}_{sp}})}^{1/4}}\]
  done clear
  C)
         \[s={{(256{{K}_{sp}})}^{1/5}}\]   
  done clear
  D)
        \[s={{({{K}_{sp}}/256)}^{1/5}}\]
  done clear
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• question_answer34) The standard emf of a cell, involving one electron change is found to be 0.591 V at\[25{}^\circ C\]. The equilibrium constant of the reaction is \[(F=96500\text{ }C\text{ }mo{{l}^{-1}})\]
  A)
  \[1.0\times {{10}^{1}}\]      
  done clear
  B)
                         \[1.0\times {{10}^{5}}\]
  done clear
  C)
         \[1.0\times {{10}^{10}}\]         
  done clear
  D)
         \[1.0\times {{10}^{30}}\]
  done clear
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• question_answer35) The enthalpies of combustion of carbon and carbon monoxide are\[-393.5\]and\[-283\text{ }kJ\text{ }mo{{l}^{-1}}\]respectively. The enthalpy of formation of carbon monoxide per mole is
  A)
  \[110.5kJ\]          
  done clear
  B)
         \[676.5\text{ }kJ\]          
  done clear
  C)
         \[-\text{ }676.5\text{ }kJ\]        
  done clear
  D)
         \[-110.5kJ\]
  done clear
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• question_answer36) The limiting molar conductivities\[{{\Lambda }^{o}}\]for\[NaCl,\] \[KBr\]and\[KCl\]are 126, 152 and\[150\,S\,c{{m}^{2}}mo{{l}^{-1}}\]respectively. The\[{{\Lambda }^{o}}\]for\[~NaBr\]is
  A)
  \[128\text{ }S\text{ }c{{m}^{2}}mo{{l}^{-1}}\]  
  done clear
  B)
         \[176\,S\text{ }c{{m}^{2}}mo{{l}^{-1}}\]
  done clear
  C)
  \[278\text{ }S\text{ }c{{m}^{2}}\text{m}o{{l}^{-1}}\]
  done clear
  D)
         \[302\text{ }S\text{ }c{{m}^{2}}mo{{l}^{-1}}\]
  done clear
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• question_answer37) In a cell that utilises the reaction, \[Zn(s)+2{{H}^{+}}(aq)\xrightarrow{{}}Z{{n}^{2+}}(aq)+{{H}_{2}}(g)\] addition of\[{{H}_{2}}S{{O}_{4}}\]to cathode compartment, will
  A)
  lower the E and shift equilibrium to the left
  done clear
  B)
  lower the E and shift the equilibrium to the right
  done clear
  C)
  increase the E and shift the equilibrium to the right
  done clear
  D)
  increase the E and shift the equilibrium to the left
  done clear
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• question_answer38) Which one of the following statements regarding helium is incorrect?
  A)
  It is used to fill gas balloons instead of hydrogen because it is lighter and non-inflammable
  done clear
  B)
  It is used as a cryogenic agent for carrying out experiments at low temperatures
  done clear
  C)
  It is used to produce and sustain powerful superconducting magnets
  done clear
  D)
  It is used in gas-cooled nuclear reactors
  done clear
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• question_answer39) Identify the correct statement regarding enzymes.
  A)
  Enzymes are specific biological catalysts that can normally function at very high temperatures\[(T\tilde{\ }1000K)\]
  done clear
  B)
  Enzymes  are   normally  heterogeneous catalysts that are very specific in their action
  done clear
  C)
  Enzymes are specific biological catalysts that cannot be poisoned
  done clear
  D)
  Enzymes are specific biological catalysts that possess well defined active sites
  done clear
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• question_answer40) One mole of magnesium nitride on the reaction with an excess of water gives
  A)
  one mole of ammonia
  done clear
  B)
  one mole of nitric acid
  done clear
  C)
  two moles of ammonia
  done clear
  D)
  two moles of nitric acid
  done clear
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• question_answer41) Which one of the following ores is best concentrated by froth-floatation method?
  A)
  Magnetite          
  done clear
  B)
  Cassiterite          
  done clear
  C)
         Galena           
  done clear
  D)
         Malachite
  done clear
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• question_answer42) Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in
  A)
  exhibiting maximum covalency in compounds
  done clear
  B)
  forming polymeric hydrides
  done clear
  C)
  forming covaient halides
  done clear
  D)
  exhibiting amphoteric nature in their oxides
  done clear
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• question_answer43) Aluminium chloride exists as dimer,\[A{{l}_{2}}C{{l}_{6}}\]in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives
  A)
  \[A{{l}^{3+}}+3C{{l}^{-}}\]                           
  done clear
  B)
  \[{{[Al{{({{H}_{2}}O)}_{6}}]}^{3+}}+3C{{l}^{-}}\]
  done clear
  C)
  \[{{[Al{{(OH)}_{6}}]}^{3+}}+3HCl\]
  done clear
  D)
         \[A{{l}_{2}}{{O}_{3}}+6HCl\]
  done clear
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• question_answer44) The soldiers of Napolean army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to
  A)
  a change in the crystalline structure of tin
  done clear
  B)
  an interaction with nitrogen of the air at very low temperatures
  done clear
  C)
  a change in the partial pressure of oxygen in the air
  done clear
  D)
  an interaction with water vapour contained in the humid air
  done clear
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• question_answer45) The\[E_{{{M}^{3+}}/{{M}^{2+}}}^{o}\]values for\[Cr,Mn,Fe\]and\[Co\]are\[-0.41+1.57.+0.77\]and\[+1.97\text{ }V\]respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?
  A)
  \[Cr\]    
  done clear
  B)
                         \[Mn\]                 
  done clear
  C)
         \[Fe\]                   
  done clear
  D)
         \[Co\]
  done clear
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• question_answer46) Excess of\[KI\]reacts with\[CuS{{O}_{4}}\]solution and then\[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\]solution is added to it. Which of the statements is incorrect for this reaction?
  A)
  \[C{{u}_{2}}{{l}_{2}}\]is formed
  done clear
  B)
  \[Cu{{l}_{2}}\]is formed
  done clear
  C)
  \[N{{a}_{2}}{{S}_{2}}{{O}_{3}}\]is oxidized
  done clear
  D)
  Evolved\[{{I}_{2}}\]is reduced
  done clear
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• question_answer47) Among the properties (A) reducing (B) oxidizing (C) completing, the set of properties shown by\[C{{N}^{-}}\]ion towards metal species is
  A)
  A, B
  done clear
  B)
                         B, C       
  done clear
  C)
         C, A       
  done clear
  D)
         A, B, C
  done clear
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• question_answer48) The coordination number of a central metal atom in a complex is determined by
  A)
  the number of ligands around a metal ion bonded by sigma bonds
  done clear
  B)
  the number of ligands around a metal ion bonded by pi-bonds
  done clear
  C)
  the number of ligands around a metal ion bonded by sigma and pi-bonds both
  done clear
  D)
  the number of only anionic ligands bonded to the metal ion
  done clear
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• question_answer49) Which one of the following complexes is an outer orbital complex? (At. nos.\[Mn=22,Fe=26,Co=27,Ni=28\])
  A)
  \[{{[Fe{{(CN)}_{6}}]}^{4-}}\]     
  done clear
  B)
        \[{{[Mn{{(CN)}_{6}}]}^{4-}}\]                    
  done clear
  C)
   \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]    
  done clear
  D)
         \[{{[Ni{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
  done clear
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• question_answer50) Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?
  A)
  Chlorophylls are green pigments in plants and contain calcium
  done clear
  B)
  Haemoglobin is the red pigment of blood and contains iron
  done clear
  C)
  Cyanocobalamin is vitamin \[{{B}_{12}}\] and contains cobalt
  done clear
  D)
  Carboxypeptidase-A is an enzyme and contains zinc
  done clear
  View Answer play_arrow

• question_answer51) Cerium\[(Z=58)\]is an important member of the lanthanides. Which of the following statements about cerium is incorrect?
  A)
  The common oxidation states of cerium are + 3 and + 4
  done clear
  B)
  The +3 oxidation state of cerium is more stable than the + 4 oxidation state
  done clear
  C)
  The + 4 oxidation state of cerium is not known in solutions
  done clear
  D)
  Cerium (IV) acts as an oxidizing agent
  done clear
  View Answer play_arrow

• question_answer52) Which one of the following has largest number of isomers? (R = alkyl group, en= ethylenediamine)
  A)
  \[{{[Ru{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]}^{+}}\]     
  done clear
  B)
  \[{{[Co{{(N{{H}_{3}})}_{5}}Cl]}^{2+}}\]
  done clear
  C)
         \[{{[lr\,\,{{(P{{R}_{3}})}_{2}}\,H(CO)]}^{2+}}\]   
  done clear
  D)
  \[{{[Co{{(en)}_{2}}C{{l}_{2}}]}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer53) The correct order of magnetic moments (spin only values in BM) among the following is (At. nos.\[Mn=25,\text{ }Fe=26,\text{ }Co=27\])
  A)
  \[{{[MnC{{l}_{4}}]}^{2-}}>{{[CoC{{l}_{4}}]}^{2-}}>{{[Fe{{(CN)}_{6}}]}^{4-}}\]
  done clear
  B)
  \[{{[MnC{{l}_{4}}]}^{2-}}>{{[Fe{{(CN)}_{6}}]}^{4-}}>{{[CoC{{l}_{4}}]}^{2-}}\]
  done clear
  C)
  \[{{[Fe{{(CN)}_{6}}]}^{4-}}>{{[MnC{{l}_{4}}]}^{2-}}>{{[CoC{{l}_{4}}]}^{2-}}\]
  done clear
  D)
  \[{{[Fe{{(CN)}_{6}}]}^{4-}}>{{[CoC{{l}_{4}}]}^{2-}}>{{[MnC{{l}_{4}}]}^{2-}}\]
  done clear
  View Answer play_arrow

• question_answer54) Consider the following nuclear reactions \[_{92}^{238}M\to _{y}^{x}N+2_{2}^{4}He;_{y}^{x}N\to _{B}^{A}L+2{{\beta }^{+}}\] The number of neutrons in the element L is
  A)
  142      
  done clear
  B)
                                         144                        
  done clear
  C)
  140                        
  done clear
  D)
         146
  done clear
  View Answer play_arrow

• question_answer55) The half-life of a radioisotope is four hours. If the initial mass of the isotope was 200 g, the mass remaining after 24 h undecayed is
  A)
  1.042g  
  done clear
  B)
                         2.084 g 
  done clear
  C)
         3.125 g          
  done clear
  D)
         4.167 g
  done clear
  View Answer play_arrow

• question_answer56) The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is
  A)
  \[F{{e}_{4}}{{[Fe{{(CN)}_{6}}]}_{3}}\]
  done clear
  B)
  \[N{{a}_{3}}[Fe{{(CN)}_{6}}]\]
  done clear
  C)
  \[Fe{{(CN)}_{3}}\]
  done clear
  D)
  \[N{{a}_{4}}[Fe{{(CN)}_{5}}NOS]\]
  done clear
  View Answer play_arrow

• question_answer57) The ammonia evolved from the treatment of 0.30 g of an organic compound for the estimation of nitrogen was passed in 100 mL of 0.1 M sulphuric acid. The excess of acid required 20 mL of 0.5 M sodium hydroxide solution for complete neutralization. The organic compound is
  A)
  acetamide          
  done clear
  B)
  benzamide
  done clear
  C)
  urea                      
  done clear
  D)
         thiourea
  done clear
  View Answer play_arrow

• question_answer58) Which one of the following has the minimum boiling point?
  A)
  \[n-\]butane       
  done clear
  B)
         1-butyne            
  done clear
  C)
         1-butene         
  done clear
  D)
         Isobutene
  done clear
  View Answer play_arrow

• question_answer59) The IUPAC name of the compound is
  A)
  3, 3-dimethyM-hydroxy cyclohexane
  done clear
  B)
  1, 1-dimethyl-3-hydroxy cyclohexane
  done clear
  C)
  3, 3-dimethyM-cyclohexanol
  done clear
  D)
  1, 1 -dimethyl-3-cyclohexanol
  done clear
  View Answer play_arrow

• question_answer60) Which one of the following does not have\[s{{p}^{2}}\]hybridised carbon?
  A)
  Acetone              
  done clear
  B)
  Acetic acid          
  done clear
  C)
          Acetonitrile       
  done clear
  D)
         Acetamide         
  done clear
  View Answer play_arrow

• question_answer61) Which of the following will have a meso-isomer also?
  A)
  2-chlorobutane
  done clear
  B)
  2, 3-dichlorobutane
  done clear
  C)
  2, 3-dichloropentane
  done clear
  D)
  2-hydroxypropanoic acid
  done clear
  View Answer play_arrow

• question_answer62) Rate of the reaction is fastest when Z is
  A)
  \[Cl\]           
  done clear
  B)
                         \[N{{H}_{2}}\]                  
  done clear
  C)
  \[O{{C}_{2}}{{H}_{5}}\]                 
  done clear
  D)
  \[OCOC{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer63) Amongst the following compounds, the optically active alkane having lowest molecular mass is
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]
  done clear
  C)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  {{C}_{2}}{{H}_{5}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  H \\  | \end{smallmatrix}}{\mathop{C}}}\,-\]
  done clear
  D)
  \[C{{H}_{3}}-C{{H}_{2}}-C\equiv CH\]
  done clear
  View Answer play_arrow

• question_answer64) Consider the acidity of the carboxylic acids (i) \[PhCOOH\] (ii) \[o-N{{O}_{2}}{{C}_{6}}{{H}_{4}}COOH\] (iii) \[p-N{{O}_{2}}{{C}_{6}}{{H}_{4}}COOH\] (iv) \[m-N{{O}_{2}}{{C}_{6}}{{H}_{4}}COOH\] Which of the following order is correct?
  A)
  (i) > (ii) > (iii) >(iv)
  done clear
  B)
  (ii) > (iv) > (iii) > (i)
  done clear
  C)
  (ii) > (iv) > (i) > (iii)
  done clear
  D)
  (ii), > (iii) > (iv) > (i)
  done clear
  View Answer play_arrow

• question_answer65) Which of the following is the strongest base?
  A)
   
  done clear
  B)
          
  done clear
  C)
      
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer66) Which base is present in RNA but not in DNA?
  A)
  Uracil  
  done clear
  B)
                         Cytosine                             
  done clear
  C)
  Guanine              
  done clear
  D)
  Thymine
  done clear
  View Answer play_arrow

• question_answer67) The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is
  A)
  gammexene     
  done clear
  B)
         DDT                       
  done clear
  C)
  freon             
  done clear
  D)
         hexachloroethane
  done clear
  View Answer play_arrow

• question_answer68) On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is
  A)
  \[C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}+NaCl\]
  done clear
  B)
  \[C{{H}_{3}}COONa+{{C}_{2}}{{H}_{5}}OH\]
  done clear
  C)
  \[C{{H}_{3}}COCl+{{C}_{2}}{{H}_{5}}OH+NaOH\]
  done clear
  D)
  \[C{{H}_{3}}Cl+{{C}_{2}}{{H}_{5}}COONa\]
  done clear
  View Answer play_arrow

• question_answer69) Acetyl bromide reacts with excess of\[C{{H}_{3}}MgI\]followed by treatment with a saturated solution of \[N{{H}_{4}}Cl\]gives
  A)
  acetone
  done clear
  B)
  acetamide
  done clear
  C)
  2-methyl-2-propanol
  done clear
  D)
  acetyl iodide
  done clear
  View Answer play_arrow

• question_answer70) Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?
  A)
  Ethyl acetate
  done clear
  B)
  Acetic acid
  done clear
  C)
  Acetamide
  done clear
  D)
  Butan-2-one
  done clear
  View Answer play_arrow

• question_answer71) Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?
  A)
  Phenol
  done clear
  B)
  Benzaldehyde
  done clear
  C)
  Butanal
  done clear
  D)
  Benzoicacid
  done clear
  View Answer play_arrow

• question_answer72) Among the following compounds which can be dehydrated very easily?
  A)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}OH\]
  done clear
  B)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{CH}}\,C{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{3}}C{{H}_{2}}\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix}  | \\  OH \end{smallmatrix}}{\mathop{CC{{H}_{2}}}}\,}}\,C{{H}_{3}}\]
  done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CHC{{H}_{2}}}}\,C{{H}_{2}}OH\]
  done clear
  View Answer play_arrow

• question_answer73) Which of the following compounds is not chiral?
  A)
  1-chloropentane
  done clear
  B)
  2-chioropentane
  done clear
  C)
  1-chloro-2-methyl pentane
  done clear
  D)
  3-chloro-2-methyl pentane
  done clear
  View Answer play_arrow

• question_answer74) Insulin production and its action in human body are responsible for the level of diabetes. This compound belongs to which of the following categories?
  A)
  A co-enzyme
  done clear
  B)
        A hormone                        
  done clear
  C)
  An enzyme       
  done clear
  D)
         An antibiotic
  done clear
  View Answer play_arrow

• question_answer75) The smog is essentially caused by the presence of
  A)
  \[{{O}_{2}}\]and\[{{O}_{3}}\]
  done clear
  B)
  \[{{O}_{2}}\]and\[{{N}_{2}}\]
  done clear
  C)
  oxides of sulphur and nitrogen
  done clear
  D)
  \[{{O}_{3}}\]and\[{{N}_{2}}\]
  done clear
  View Answer play_arrow