Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2014)

done JEE Main Paper (Held On 11 April 2014) Total Questions - 30

• question_answer1) If \[{{\lambda }_{o}}\]and \[\lambda \] be threshold wavelength and wavelength of incident light, the velocity of photoelectron ejected from the metal surface is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[\sqrt{\frac{2h}{m}\left( {{\lambda }_{o}}-\lambda  \right)}\]  
  done clear
  B)
  \[\sqrt{\frac{2hc}{m}\left( {{\lambda }_{o}}-\lambda  \right)}\]
  done clear
  C)
  \[\sqrt{\frac{2hc}{m}\left( \frac{{{\lambda }_{o}}-\lambda }{\lambda {{\lambda }_{o}}} \right)}\]             
  done clear
  D)
  \[\sqrt{\frac{2h}{m}\left( \frac{1}{{{\lambda }_{o}}}-\frac{1}{\lambda } \right)}\]
  done clear
  View Answer play_arrow

• question_answer2) The appearance of colour in solid alkali meta halides is generally due to:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Schottky defect               
  done clear
  B)
  Frenkel defect
  done clear
  C)
  Interstitial position         
  done clear
  D)
  F-centres
  done clear
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• question_answer3) In the reaction of formation of sulphur trioxide by contact process \[2S{{O}_{2}}+{{O}_{2}}\rightleftharpoons 2S{{O}_{3}}\]the rate of reaction was measured as\[\frac{d\left[ {{O}_{2}} \right]}{dt}=-2.5\times {{10}^{-4}}\text{mol}\]\[\,{{L}^{-1}}{{s}^{-1}}.\]  The rate of reaction is terms of \[[S{{O}_{2}}]\]in mol \[{{\text{L}}^{\text{-1}}}\,{{\text{s}}^{\text{-1}}}\] will be:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[-1.25\times {{10}^{-4}}\]                          
  done clear
  B)
  \[-2.50\times {{10}^{-4}}\]
  done clear
  C)
  \[-3.75\times {{10}^{-4}}\]                          
  done clear
  D)
  \[-5.00\times {{10}^{-4}}\]
  done clear
  View Answer play_arrow

• question_answer4) Assuming that the degree of hydrolysis is small, the pH of 0.1 M solution of sodium acetate \[({{K}_{a}}=1.0\times {{10}^{-5}})\] will be:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  5.0                                         
  done clear
  B)
  6.0
  done clear
  C)
  8.0                                         
  done clear
  D)
  9.0
  done clear
  View Answer play_arrow

• question_answer5) For the reaction, \[2{{N}_{2}}{{O}_{5}}\to 4N{{O}_{2}}+{{O}_{2}},\]the rate equation can be expressed in two ways\[-\frac{d\left[ {{N}_{2}}{{O}_{5}} \right]}{dt}=k\left[ {{N}_{2}}{{O}_{5}} \right]\] and \[+\frac{d\left[ N{{O}_{2}} \right]}{dt}=k'\left[ {{N}_{2}}{{O}_{5}} \right]\]k and k' are related as:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  k = k'                   
  done clear
  B)
  2k = k'
  done clear
  C)
  k = 2k'                 
  done clear
  D)
  k = 4k'
  done clear
  View Answer play_arrow

• question_answer6) In some solutions, the concentration of \[{{H}_{3}}{{O}^{+}}\] remains constant even when small amounts of strong acid or strong base are added to them. These solutions are known as:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Ideal solutions  
  done clear
  B)
  Colloidal solutions
  done clear
  C)
  True solutions  
  done clear
  D)
  Buffer solutions
  done clear
  View Answer play_arrow

• question_answer7) Given \[F{{e}^{3+}}(aq)+{{e}^{-}}\to F{{e}^{2+}}(aq);{{E}^{0}}=+0.77V\] \[A{{l}^{3+}}(aq)+3{{e}^{-}}\to Al(s);{{E}^{0}}=-1.66V\] \[B{{r}_{2}}(aq)+2{{e}^{-}}\to 2B{{r}^{-}};{{E}^{0}}=+1.09V\] Considering the electrode potentials, which of the following represents the correct order of reducing power?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[F{{e}^{2+}}<Al<B{{r}^{-}}\]     
  done clear
  B)
  \[B{{r}^{-}}<F{{e}^{2+}}<Al\]
  done clear
  C)
  \[Al<B{{r}^{-}}<F{{e}^{2+}}\]     
  done clear
  D)
  \[Al<F{{e}^{2+}}<B{{r}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer8) The initial volume of a gas cylinder is 750.0 mL. If the pressure of gas inside the cylinder changes from 840.0 mm Hg to 360.0 mm Hg, the final volume the gas will be:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  1.750 L                 
  done clear
  B)
  3.60 L
  done clear
  C)
  4.032 L                 
  done clear
  D)
  7.50 L
  done clear
  View Answer play_arrow

• question_answer9) The molar heat capacity \[({{C}_{p}})\] of \[C{{D}_{2}}O\]is 10 cals at 1000 K. The change in entropy associated with cooling of 32 g of \[C{{D}_{2}}O\]vapour from 1000 K to 100 K at constant pressure will be: (D = deuterium, atomic mass = 2 u)   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[\text{23}\text{.03cal}\,\text{de}{{\text{g}}^{\text{-1}}}\]        
  done clear
  B)
  \[\text{-23}\text{.03cal}\,\text{de}{{\text{g}}^{\text{-1}}}\]
  done clear
  C)
  \[\text{2}\text{.303cal}\,\text{de}{{\text{g}}^{\text{-1}}}\]        
  done clear
  D)
  \[\text{-2}\text{.303cal}\,\text{de}{{\text{g}}^{\text{-1}}}\]
  done clear
  View Answer play_arrow

• question_answer10) Based on the equation: \[\Delta E=-2.0\times {{10}^{-18}}J\left( \frac{1}{n_{2}^{2}}-\frac{1}{n_{1}^{2}} \right)\]the wavelength of the light that must be absorbed to excite hydrogen electron from level n = 1 to level n = 2 will be: \[(h=6.625\times {{10}^{-34}}Js,C=3\times {{10}^{8}}m{{s}^{-1}})\]   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[1.325\times {{10}^{-7}}m\]
  done clear
  B)
  \[1.325\times {{10}^{-10}}m\]
  done clear
  C)
  \[2.650\times {{10}^{-7}}m\]     
  done clear
  D)
  \[5.300\times {{10}^{-10}}m\]
  done clear
  View Answer play_arrow

• question_answer11) Which of the following series correctly represents relations between the elements from X to Y? \[X\to Y\]   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[_{3}Li{{\to }_{19}}K\] Ionization enthalpy increases
  done clear
  B)
  \[_{9}F{{\to }_{35}}Br\] Electron gain enthalpy (negative sign) increases
  done clear
  C)
  \[_{6}C{{\to }_{32}}Ge\] Atomic radii increases
  done clear
  D)
  \[_{18}Ar{{\to }_{54}}Xe\] Noble character increases
  done clear
  View Answer play_arrow

• question_answer12) The correct order of bond dissociation energy among \[{{N}_{2}},{{O}_{2}},O_{2}^{-}\]is shown in which of the following arrangements?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[{{N}_{2}}>O_{2}^{-}>{{O}_{2}}\]          
  done clear
  B)
  \[O_{2}^{-}>{{O}_{2}}>{{N}_{2}}\]
  done clear
  C)
  \[N_{2}^{{}}>{{O}_{2}}>O_{2}^{-}\]        
  done clear
  D)
  \[{{O}_{2}}>O_{2}^{-}>N_{2}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer13) Which of the following statements about \[N{{a}_{2}}{{O}_{2}}\] is not correct?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  It is diamagnetic in nature
  done clear
  B)
  It is derivative of \[{{H}_{2}}{{O}_{2}}\]
  done clear
  C)
  \[N{{a}_{2}}{{O}_{2}}\]oxidises \[C{{r}^{3+}}\] to \[CrO_{4}^{2-}\]in acid medium.
  done clear
  D)
  It is the super oxide of sodium
  done clear
  View Answer play_arrow

• question_answer14) Which of the following statements about the depletion of ozone layer is correct?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  The problem of ozone depletion is less serious at poles because \[N{{O}_{2}}\] solidifies and is not available for consuming \[CI{{O}^{\bullet }}\]radicals.
  done clear
  B)
  The problem of ozone depletion is more serious at poles because ice crystals in the clouds over poles act as catalyst for photochemical reactions involving the decomposition of ozone of \[C{{l}^{\bullet }}\] and \[Cl{{O}^{\bullet }}\] radicals.
  done clear
  C)
  Freons, chlorofluorocarbons, are inert. Chemically, they do not react with ozone in stratosphere.
  done clear
  D)
  Oxides of nitrogen also do not react with ozone in stratosphere.
  done clear
  View Answer play_arrow

• question_answer15) A gaseous compound of nitrogen and hydrogen contains 12.5% (by mass) of hydrogen. The density of the compound relative to hydrogen is 16. The molecular formula of the compound is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[N{{H}_{2}}\]                  
  done clear
  B)
  \[{{N}_{3}}H\]
  done clear
  C)
  \[N{{H}_{3}}\]                  
  done clear
  D)
  \[{{N}_{2}}{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer16) Shapes of certain interhalogen compounds are stated below. Which one of them is not correctly stated?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[\text{I}{{\text{F}}_{\text{7}}}\] : pentagonal bipyramid
  done clear
  B)
  \[\text{Br}{{\text{F}}_{5}}\] : trigonal bipyramid
  done clear
  C)
  \[\text{Br}{{\text{F}}_{3}}\] : planar T-shaped
  done clear
  D)
  \[\text{IC}{{\text{I}}_{3}}\]: planar dimeric
  done clear
  View Answer play_arrow

• question_answer17) Consider the following equilibrium \[AgCl\downarrow +2N{{H}_{3}}\rightleftharpoons {{\left[ Ag{{\left( N{{H}_{3}} \right)}_{2}} \right]}^{+}}+C{{l}^{-}}\] White precipitate of AgCl appears on adding which of the following?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[N{{H}_{3}}\]                   aqueous NaCl
  done clear
  B)
  aqueous \[HN{{O}_{3}}\]            
  done clear
  C)
  aqueous \[N{{H}_{4}}Cl\]
  done clear
  View Answer play_arrow

• question_answer18) Which of the following name formula combinations is not correct?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)

  Formula
  \[{{K}_{2}}[Pt{{\left( CN \right)}_{4}}]\]	Potassium tetracyanoplatinate (II)

  done clear
  B)

  Formula
  \[{{[Mn\left( CN \right)5]}^{2}}\]	Pentacyanomagnate (II) ion

  done clear
  C)

  Formula
  \[K[Cr{{(N{{H}_{3}})}_{2}}C{{l}_{4}}]\]	Potassium diammine tetrachlorochromate (III)

  done clear
  D)

  Formula
  \[[Co{{(N{{H}_{3}})}_{4}}({{H}_{2}}O)I]S{{O}_{4}}\]	Magnetron value.

  done clear
  View Answer play_arrow

• question_answer19) Consider the coordination compound, \[[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}.\]In the formation of this complex, the species which acts as the Lewis acid is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  B)
  \[C{{l}^{-}}\]
  done clear
  C)
  \[C{{o}^{3+}}\]                 
  done clear
  D)
  \[N{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer20) Which one of the following does not have a pyramidal shape?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[{{(C{{H}_{3}})}_{3}}N\]                             
  done clear
  B)
  \[{{(Si{{H}_{3}})}_{3}}N\]
  done clear
  C)
  \[P{{(C{{H}_{3}})}_{3}}\]                              
  done clear
  D)
  \[P{{(Si{{H}_{3}})}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer21) The following reaction  is known as:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Perkin reaction
  done clear
  B)
  Gatterman-Koch Formylation
  done clear
  C)
  Kolbe?s reaction
  done clear
  D)
  Gattermann reaction
  done clear
  View Answer play_arrow

• question_answer22) The reagent needed for converting   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Cat. Hydrogenation        
  done clear
  B)
  \[{{H}_{2}}/\]Lindlar Cat.
  done clear
  C)
  \[Li/N{{H}_{3}}\]                             
  done clear
  D)
  \[LiAl{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer23) Complete reduction of benzene-diazonium chloride with Zn/ HCl gives:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Aniline
  done clear
  B)
  Phenylhydrazine
  done clear
  C)
  Azobenzene                     
  done clear
  D)
  Hydrazobenzene
  done clear
  View Answer play_arrow

• question_answer24) An organic compound \[A,{{C}_{5}}{{H}_{8}}O;\]reacts with \[{{H}_{2}}O,N{{H}_{3}}\]and \[C{{H}_{3}}COOH\] as described below: A is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  \[C{{H}_{3}}CH=\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-CHO\]
  done clear
  B)
  \[C{{H}_{2}}=CH\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-CHO\]
  done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,=C=O\]
  done clear
  D)
  \[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  || \\  C{{H}_{2}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  H \end{smallmatrix}}{\mathop{C}}\,=O\]
  done clear
  View Answer play_arrow

• question_answer25) In allene \[({{C}_{3}}{{H}_{4}}),\]the type(s) of hybridization of the carbon atoms is (are) :   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  sp and \[\text{s}{{\text{p}}^{\text{3}}}\]                             
  done clear
  B)
  \[\text{s}{{\text{p}}^{2}}\]and sp
  done clear
  C)
  only                                                                                                                                        
  done clear
  D)
                                                                                                           and                                                                                                        
  done clear
  View Answer play_arrow

• question_answer26) Chlorobenzne reacts with trichloro acetaldehyde in the presence of                                                                                                     The major product formed is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer27) Tischenko reaction is a modification of:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Aldol condensation
  done clear
  B)
  Claisen condensation
  done clear
  C)
  Cannizzaro reaction
  done clear
  D)
  Pinacol-pinacolon reaction
  done clear
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• question_answer28) Which one of the following is used as Antihistamine?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Omeprazole                      
  done clear
  B)
  Chloranphenicol
  done clear
  C)
  Diphenhydramine          
  done clear
  D)
  Norethindrone
  done clear
  View Answer play_arrow

• question_answer29) Which one of the following statements is not correct?   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Alcohols are weaker acids than water
  done clear
  B)
  Acid strength of alcohols decreases in the following \[RC{{H}_{2}}>{{R}_{2}}CHOH>{{R}_{3}}COH\]
  done clear
  C)
  Carbon-oxygen bond length in methanol, \[C{{H}_{3}}OH\] is shorter than that of C - O bond length in phenol.
  done clear
  D)
  The bond angle in methanol is \[108.9{}^\circ \].
  done clear
  View Answer play_arrow

• question_answer30) The gas liberated by the electrolysis of Dipotassium succinate solution is:   [JEE Main Online Paper ( Held On 11 Apirl  2014 )
  A)
  Ethane                 
  done clear
  B)
  Ethyne
  done clear
  C)
  Ethene                 
  done clear
  D)
  PropeneAT
  done clear
  View Answer play_arrow