Solved papers for JEE Main & Advanced JEE Main Paper (Held On 22 April 2013)

done JEE Main Paper (Held On 22 April 2013)

  • question_answer1) Oxidation state of sulphur in anions \[\operatorname{S}\operatorname{O}_{3}^{2-},{{\operatorname{S}}_{2}}\operatorname{O}_{4}^{2-},\] and \[{{\operatorname{S}}_{2}}\operatorname{O}_{6}^{2-}\] increases  in the orders:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[{{\operatorname{S}}_{2}}\operatorname{O}_{6}^{2-}<{{\operatorname{S}}_{2}}\operatorname{O}_{4}^{2-}<\operatorname{S}\operatorname{O}_{3}^{2-}\]

    B)  \[\operatorname{S}\operatorname{O}_{3}^{2-}<{{\operatorname{S}}_{2}}\operatorname{O}_{4}^{2-}<{{\operatorname{S}}_{2}}\operatorname{O}_{6}^{2-}\]

    C)  \[{{\operatorname{S}}_{2}}\operatorname{O}_{4}^{2-}<\operatorname{S}\operatorname{O}_{3}^{2-}<{{\operatorname{S}}_{2}}\operatorname{O}_{6}^{2-}\]

    D)  \[{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}<SO_{3}^{2-}\]

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  • question_answer2) A major component of Borsch regent is obtained by reacting hydrazine hydrate with of the following?     JEE Main  Online Paper (Held On 22 April 2013)

    A)          

    B)  

    C)  

    D)  

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  • question_answer3) Given                 Reaction                                Energy Change (in KJ)                 \[\operatorname{L}\operatorname{i}(\operatorname{s})\to \operatorname{Li}(g)\]                                           161                 \[\operatorname{L}\operatorname{i}(g)\to {{\operatorname{Li}}^{+}}(g)\]                             520                 \[\frac{1}{2}{{\operatorname{F}}_{2}}(g)\to \operatorname{F}(g)\]                          77\[{{\operatorname{F}}_{2}}(g)+{{e}^{-}}\to {{\operatorname{F}}^{-}}(g)\]               (Electron gain                                                                                 enthalpy)                 \[\operatorname{L}{{\operatorname{i}}^{+}}(g)+{{\operatorname{F}}^{-}}(g)\to Li\,\,\operatorname{F}(s)\]   -1047                 \[\operatorname{L}\operatorname{i}(\operatorname{s})+\frac{1}{2}{{\operatorname{F}}_{2}}(g)\to \operatorname{Li}\operatorname{F}(s)\]       -617                 Based on data provided, the value of electron gain enthalpy of fluorine would be:     JEE Main  Online Paper (Held On 22 April 2013)

    A) \[-300\operatorname{k}\operatorname{J}{{\operatorname{mol}}^{-1}}\]              

    B) \[-350\operatorname{k}\operatorname{J}{{\operatorname{mol}}^{-1}}\]

    C) \[-328\operatorname{k}\operatorname{J}{{\operatorname{mol}}^{-1}}\]              

    D) \[-228\operatorname{k}\operatorname{J}{{\operatorname{mol}}^{-1}}\]

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  • question_answer4) A molecule M associates in given solvent according to the equation \[\operatorname{M}\underset{{}}{\overset{{}}{\longleftrightarrow}}{{(\operatorname{M})}_{\operatorname{n}.}}\] For a certain concentration of  M, The van? t Hoff factor was found to 0.9 and the fraction of associated molecules was 0.2 The value of n is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  3                                            

    B)  5

    C)  2                                            

    D)  4

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  • question_answer5) The solubility order for alkali metal fluoride in water is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  LiF < RbF < KF < NaF

    B)  RbF < KF < NaF < LiF

    C)  LiF > NaF > KF > RbF

    D)  LiF < NaF < KF < RbF

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  • question_answer6) \[\text{Xe}{{\operatorname{O}}_{4}}\] molecule is tetrahedral having:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  Two \[p\pi -d\pi \] bonds

    B)  One \[p\pi -d\pi \] bond

    C)  Four \[p\pi -d\pi \] bonds

    D)  Three \[p\pi -d\pi \] bonds

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  • question_answer7) The reaction  \[\operatorname{X}\to \operatorname{Y}\] is an exothermic reaction. Activation energy of the reaction for X into \[\operatorname{Y}\] is 150 \[150\operatorname{K}\operatorname{J}{{\operatorname{mol}}^{-1}}\]. Enthalpy of reaction is \[135\operatorname{K}\operatorname{J}{{\operatorname{mol}}^{-1}}\]. The activation energy for the reverse reaction, \[\operatorname{Y}\to \operatorname{X}\] will be:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[280\operatorname{kJ}{{\operatorname{mol}}^{-1}}\]                            

    B)  \[285\operatorname{kJ}{{\operatorname{mol}}^{-1}}\]            

    C)  \[270\operatorname{kJ}{{\operatorname{mol}}^{-1}}\]                            

    D)  \[15\operatorname{kJ}{{\operatorname{mol}}^{-1}}\]

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  • question_answer8) For which of the following compounds Kjeldahl method can be used to determine the percentage of Nitrogen?     JEE Main  Online Paper (Held On 22 April 2013)

    A)  Nitrobenzene                     

    B)  Pyridine

    C)  Alanine                                

    D)  Diazomethane

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  • question_answer9) Which of the following statements about aspirin is not true     JEE Main  Online Paper (Held On 22 April 2013)

    A)  It is effective in reliving pain

    B)  It is a neurologically active drug

    C)  It has antiblood clotting action

    D)  It belongs to narcotic analgesics

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  • question_answer10) The density of 3M solution of sodium chloride is  1.252\[~\text{gm}{{\text{L}}^{-1}}\]. The molality of the solution will be: (molar mass,\[\text{NaCI }=\text{85}.\text{5 g mo}{{\text{l}}^{\text{-1}}}\])     JEE Main  Online Paper (Held On 22 April 2013)

    A)  2.60 m                  

    B)  2.18 m

    C)  2.79 m                  

    D)  3.00 m

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  • question_answer11) Which of the following structures represents thymine?     JEE Main  Online Paper (Held On 22 April 2013)

    A)            

    B)  

    C)  

    D)  

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  • question_answer12) The polymer used for optical lenses is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  polypropylene    

    B)  polyvinyl chloride 

    C)  polythene

    D)  polymethyl methacrylate

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  • question_answer13) Which of the following is diamagnetic?     JEE Main  Online Paper (Held On 22 April 2013)

    A) \[[\operatorname{F}e{{({{\operatorname{CN}}_{6}})}^{3-}}\]                    

    B)  \[{{[\operatorname{Co}(\operatorname{O}\operatorname{X})]}^{3-}}\]

    C)  \[{{[\operatorname{Fe}{{\operatorname{F}}_{6}}]}^{3-}}\]                        

    D)  \[{{[\operatorname{Co}{{\operatorname{F}}_{6}}]}^{3-}}\]

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  • question_answer14) Bond order normally gives idea of stability of a molecular species. All the molecules viz. \[{{\operatorname{H}}_{2}},\] \[\operatorname{L}{{\operatorname{i}}_{2}}\] and \[{{\operatorname{B}}_{2}}\] have the same bond order yet they are not equally stable. The Their stability order is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[{{\text{H}}_{\text{2}}}>{{\text{B}}_{\text{2}}}>\text{L}{{\text{i}}_{\text{2}}}\]      

    B)  \[\text{L}{{\text{i}}_{\text{2}}}\text{}{{\text{H}}_{\text{2}}}>{{\text{B}}_{\text{2}}}\]

    C)  \[{{\operatorname{Li}}_{2}}>{{\text{B}}_{\text{2}}}>{{\operatorname{H}}_{2}}\]  

    D)  \[{{\text{B}}_{\text{2}}}>{{\operatorname{H}}_{2}}>{{\operatorname{Li}}_{2}}\]

    E) (e) None of these

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  • question_answer15) Which one of the following arrangements represents the correct order of solubilities of sparingly soluble soluble salts\[\operatorname{H}{{\operatorname{g}}_{2}}{{\operatorname{CI}}_{2}},C{{r}_{2}}{{(S{{O}_{4}})}_{3}},\]\[BaS{{O}_{4}}\] and \[\text{CrC}{{\text{l}}_{3}}\] respectively?      JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[BaS{{O}_{4}}>H{{g}_{2}}C{{l}_{2}}>C{{r}_{2}}{{(S{{O}_{4}})}_{3}}>CrC{{l}_{3}}\]

    B)  \[BaS{{O}_{4}}>H{{g}_{2}}C{{l}_{2}}>CrC{{l}_{3}}>C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]

    C)  \[BaS{{O}_{4}}>CrC{{l}_{3}}>H{{g}_{2}}C{{l}_{2}}>C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]

    D)  \[H{{g}_{2}}C{{l}_{2}}>BaS{{O}_{4}}>CrC{{l}_{3}}>C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]

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  • question_answer16) The wave number of the first emission line in the Balmer series of H-Spectrum is: (R= Rydberg constant):     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[\frac{5}{36}\operatorname{R}\]                  

    B)  \[\frac{9}{400}\operatorname{R}\]

    C)  \[\frac{7}{6}\operatorname{R}\]                                     

    D)   \[\frac{3}{4}\operatorname{R}\]

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  • question_answer17) What is the structure of the major product when phenol is treated with bromine water?     JEE Main  Online Paper (Held On 22 April 2013)

    A)          

    B)  

    C)  

    D)  

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  • question_answer18) \[NaOH\] is a strong base. What will be pH of \[5.0\times {{10}^{-2}}\,M\,\,NaOH\] solution? \[(\log \,2\,=\,0.3)\]     JEE Main  Online Paper (Held On 22 April 2013)

    A)  14.00                                    

    B)  13.70

    C)  13.00                    

    D)  12.70

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  • question_answer19) Flocculation value of \[BaC{{l}_{2}}\] is much less then that of \[KCl\] for sol A and flocculation value of \[\operatorname{N}{{\operatorname{a}}_{2}}\operatorname{S}{{\operatorname{O}}_{4}}\] is much less than that of \[\text{NaBr}\]for sol B. The correct statement  among the following is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  Both the sols A and B are negatively charged              

    B)  Sol A is positively charged and Sol B is negatively charged

    C)  Both the sols A and B are positively charged

    D)  Sol A is negatively charged and sol B is positively charged

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  • question_answer20) Amongst the following alcohols which would react fastest with conc. HCI and \[ZnC{{l}_{2}}\]?     JEE Main  Online Paper (Held On 22 April 2013)

    A)  pentanol                              

    B)  2-methylbutanol

    C)  2-pentanol                          

    D)  2-methy lbutan-2ol

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  • question_answer21) Values of dissociation constant, \[{{\text{K}}_{\text{a}}}\]are given as follows:                 Acid                                        \[{{\text{K}}_{\text{a}}}\]                 \[\operatorname{HCN}\]                                    \[6.2\times {{10}^{-10}}\]                   \[HF\]                                     \[7.2\times {{10}^{-4}}\]                 \[HN{{O}_{2}}\]                                     \[4.0\times {{10}^{-4}}\]                 Correct order of increasing base strength of the base \[{{\operatorname{CN}}^{-}},{{\operatorname{F}}^{-}}\] and \[\operatorname{NO}_{2}^{-}\]will be:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[{{\operatorname{F}}^{-}}<{{\operatorname{CN}}^{-}}<\operatorname{NO}_{2}^{-}\]       

    B)  \[NO_{2}^{-}<C{{N}^{-}}<{{F}^{-}}\]

    C)  \[{{\operatorname{F}}^{-}}<\operatorname{NO}_{2}^{-}<{{\operatorname{CN}}^{-}}\]       

    D)  \[\operatorname{NO}_{2}^{-}<\operatorname{F}_{{}}^{-}<\operatorname{CN}_{{}}^{-}\]

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  • question_answer22) Clemmensen reduction of a ketone is carried out in the presence of :     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[LiAl{{H}_{4}}\]                  

    B)  \[Zn-Hg\] with \[HCl\]

    C)  Glycol with \[KOH\]

    D)  \[{{H}_{2}}\] with \[Pt\] as catalyst

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  • question_answer23) Which of the following statements is incorrect?     JEE Main  Online Paper (Held On 22 April 2013)

    A) \[\operatorname{F}{{\operatorname{e}}^{2}}^{+}\]ion also gives blood  red  colour  with \[{{\operatorname{SCN}}^{-}}\]ion    

    B)  \[F{{e}^{3+}}\]ion given blood red colour with \[SC{{N}^{-}}\] ion.

    C)  On Passing \[{{H}_{2}}S\] into \[N{{a}_{2}}Zn{{O}_{2}}\] solution, a white ppt of \[ZnS\] is formed

    D)  Cupric ion react with excess of ammonia solution to give deep blue colour of \[{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}\] ion.

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  • question_answer24) The  Order of increasing sizes of atomic radii among the elements O, S, Se and As is:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  \[As-S<O<Se\]    

    B)  \[Se<S<As<O\]

    C)  \[O<S<As<Se\]   

    D)   \[O<S<Se<As\]

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  • question_answer25) In Williamason synthesis of mixed ether having a primary and a tertiary alkyl  group if tertiary halide is used, then:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  Rate of reaction will be slow due to slow cleavage of carbon ? halogen bond

    B)  Alkene will be the main product

    C)  Simple ether will form instead of mixed ether

    D)   Expected mixed ether will be formed

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  • question_answer26) Which of the following would not give 2-phenylbutane as the major product in a Friedel-Crafts alkylation reaction?     JEE Main  Online Paper (Held On 22 April 2013)

    A)  1-butene + HF

    B)  2-butanol+ \[{{\operatorname{H}}_{2}}{{\operatorname{SO}}_{4}}\]

    C)  Butanoykhloride \[+AlC{{l}_{3}}\] then \[Zn,\,HCl\]

    D)  Butyl chloride \[+AlC{{l}_{3}}\]

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  • question_answer27) Arrange in the correct order of stability (decreasing order) for the following  molecules : ­­­   JEE Main  Online Paper (Held On 22 April 2013)

    A)  (I) > (II) > (III) > (IV)

    B)  (IV) > (III) > (II)\[\approx \](I)

    C)  (I) > (II) \[\approx \] (III) > (IV)

    D)  (III) > (I) \[\approx \] (II) > (IV)

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  • question_answer28) Which one of the following statements about packing in solids in incorrect?     JEE Main  Online Paper (Held On 22 April 2013)

    A)  Coordination number in bee mode of packing is 8

    B)  Coordination number in hcp mode of packing is 12.

    C)  Void space in hcp mode of packing is 32%

    D)  Void space in ccp mode of packing in 26%

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  • question_answer29) The Wurtz-Fitting reaction involues  condensation of:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  two molecules of aryl halides

    B)  one molecule of each of aryl- halide and phenol        

    C)  one molecule of each aryl-halide and phenol

    D)  two molecules of aralkyl-halides

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  • question_answer30) In Goldschmidt alumino thermic process which of the following reducing agents is used:     JEE Main  Online Paper (Held On 22 April 2013)

    A)  calcium                                

    B)  coke

    C)  AI- powder                          

    D)  sodium

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Study Package

JEE Main Online Paper (Held On 22 April 2013)
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