Solved papers for JEE Main & Advanced JEE Main Paper (Held On 11 April 2015)

done JEE Main Paper (Held On 11 April 2015) Total Questions - 30

• question_answer1) \[A+2B+3C\rightleftharpoons A{{B}_{2}}{{C}_{3}}\] Reaction of 6.0 g of \[A,6.0\times {{10}^{23}}\]atoms of B, and 0.036 mol of C yields 4.8 g of compound \[A{{B}_{2}}{{C}_{3}}.\]If the atomic mass of A and C are 60 and 80 amu, respectively, the atomic mass of B is (Avogadro no.\[=6\times {{10}^{23}}\]) : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   70 amu
  done clear
  B)
   60 amu
  done clear
  C)
   50 amu
  done clear
  D)
   40 amu
  done clear
  View Answer play_arrow

• question_answer2) When does a gas deviate the most from its ideal behaviour? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   At low pressure and low temperature
  done clear
  B)
   At low pressure and high temperature
  done clear
  C)
    At high pressure and low temperature
  done clear
  D)
   At high pressure and high temperature
  done clear
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• question_answer3) At temperature T, the average kinetic energy of any particle is \[\frac{3}{2}kT.\]The de Broglie wavelength follows the order : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   Thermal proton > Visible photon > Thermal electron
  done clear
  B)
    Thermal proton > Thermal electron Visible photon
  done clear
  C)
   Visible photon > Thermal electron > Thermal neutron
  done clear
  D)
    Visible photon > Thermal neutron > Thermal electron
  done clear
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• question_answer4) Molecule AB has a bond length of \[1.617\overset{\circ }{\mathop{\text{A}}}\,\] and a dipole moment of 0.38 D. The fractional charge on each atom (absolute magnitude) is : \[({{e}_{0}}=4.802\times {{10}^{-10}}esu)\] [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   0
  done clear
  B)
   0.05
  done clear
  C)
   0.5
  done clear
  D)
   1.0
  done clear
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• question_answer5) For the equilibrium, \[A(g)\rightleftharpoons B(g),\Delta H\]is -40 kJ/mol. If the ratio of the activation energies of the forward \[({{E}_{f}})\] and reverse \[({{E}_{b}})\]reactions is \[\frac{2}{3}\]then : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[{{E}_{f}}=60\,kJ/mol;{{E}_{b}}=100kJ/mol\]
  done clear
  B)
  \[{{E}_{f}}=30\,kJ/mol;{{E}_{b}}=70kJ/mol\]
  done clear
  C)
  \[{{E}_{f}}=80\,kJ/mol;{{E}_{b}}=120kJ/mol\]
  done clear
  D)
  \[{{E}_{f}}=70\,kJ/mol;{{E}_{b}}=30kJ/mol\]
  done clear
  View Answer play_arrow

• question_answer6) Determination of the molar mass of acetic acid in benzene using freezing point depression is affected by : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   dissociation
  done clear
  B)
   association
  done clear
  C)
   partial ionization
  done clear
  D)
   complex formation
  done clear
  View Answer play_arrow

• question_answer7) The increase of pressure on ice\[\rightleftharpoons \] water system at constant temperature will lead to : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   no effect on the equilibrium
  done clear
  B)
   a decrease in the entropy of the system
  done clear
  C)
    a shift of the equilibrium in the forward direction
  done clear
  D)
    an increase in the Gibbs energy of the system
  done clear
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• question_answer8) At 298 K, the standard reduction potentials are 1.51 V for\[MnO_{4}^{-}|M{{n}^{2+}},1.36V\]for \[C{{l}_{2}}|C{{l}^{-}},1.07V\] for \[B{{r}_{2}}|B{{r}^{-}},\]and \[0.54V\]for \[{{I}_{2}}|{{I}^{-}}.\]At pH = 3, permanganate is expected to oxidize : \[\left( \frac{RT}{F}=0.059V \right)\] [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[C{{l}^{-}},B{{r}^{-}}\]and \[{{I}^{-}}\]
  done clear
  B)
  \[C{{l}^{-}}\]and\[B{{r}^{-}}\]
  done clear
  C)
  \[B{{r}^{-}}\]and\[{{I}^{-}}\]
  done clear
  D)
  \[{{I}^{-}}\]only
  done clear
  View Answer play_arrow

• question_answer9) \[A+2B\to C,\]the rate equation for this reaction is given as Rate=k[A][B]. If the concentration of A is kept the same but that of B is doubled what will happen to the rate itself? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   halved
  done clear
  B)
   the same
  done clear
  C)
   doubled
  done clear
  D)
   quadrupled
  done clear
  View Answer play_arrow

• question_answer10) Under ambient conditions, which among the following surfactants will form micelles in aqueous solution at lowest molar concentration? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[C{{H}_{3}}{{(C{{H}_{2}})}_{15}}\overset{\oplus }{\mathop{N}}\,{{(C{{H}_{3}})}_{3}}B\overset{\Theta }{\mathop{r}}\,\]
  done clear
  B)
  \[C{{H}_{3}}-{{(C{{H}_{2}})}_{13}}-OSO_{3}^{-}N{{a}^{+}}\]
  done clear
  C)
  \[C{{H}_{3}}-{{(C{{H}_{2}})}_{8}}-COO{{O}^{\Theta }}N{{a}^{+}}\]
  done clear
  D)
  \[C{{H}_{3}}{{(C{{H}_{2}})}_{11}}\overset{\oplus }{\mathop{N}}\,{{(C{{H}_{3}})}_{3}}B{{r}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer11) Choose the incorrect formula out of the four compounds for an element X below : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[{{X}_{2}}C{{l}_{3}}\]
  done clear
  B)
  \[{{X}_{2}}{{O}_{3}}\]
  done clear
  C)
  \[{{X}_{2}}{{(S{{O}_{4}})}_{3}}\]
  done clear
  D)
  \[XP{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer12) Calamine is an ore of : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   Aluminium
  done clear
  B)
   Copper
  done clear
  C)
   Iron
  done clear
  D)
   Zinc
  done clear
  View Answer play_arrow

• question_answer13) Which physical property of dihydrogen is wrong? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   Colourless gas
  done clear
  B)
   Odourless gas
  done clear
  C)
   Tasteless gas
  done clear
  D)
   Non-inflammable gas
  done clear
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• question_answer14) Which of the alkaline earth metal halides given below is essentially covalent in nature? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[MgC{{l}_{2}}\]
  done clear
  B)
  \[BeC{{l}_{2}}\]
  done clear
  C)
  \[SrC{{l}_{2}}\]
  done clear
  D)
  \[CaC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer15) Which of the following compounds has a P-P bond? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[{{H}_{4}}{{P}_{2}}{{O}_{5}}\]
  done clear
  B)
  \[{{H}_{4}}{{P}_{2}}{{O}_{6}}\]
  done clear
  C)
  \[{{H}_{4}}{{P}_{2}}{{O}_{7}}\]
  done clear
  D)
  \[{{(HP{{O}_{3}})}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer16) Chlorine water on standing loses its colour and forms : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   \[HCl\] only
  done clear
  B)
  \[HOCl\]and \[HOC{{l}_{2}}\]
  done clear
  C)
  \[HCl\] and \[HOCl\]
  done clear
  D)
  \[HCl\] and \[HCl{{O}_{2}}\]
  done clear
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• question_answer17) Which of the following statements is false? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[CrO_{4}^{2-}\]is tetrahedral in shape
  done clear
  B)
  \[C{{r}_{2}}O_{7}^{2-}\] has a \[Cr-O-Cr\] bond
  done clear
  C)
  \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}\]is a primary standard in volumetry
  done clear
  D)
   \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}\]is less soluble than \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\]
  done clear
  View Answer play_arrow

• question_answer18) When concentrated HCl is added to an aqueous solution of \[CoC{{l}_{2}},\]its colour changes from reddish pink to deep blue. Which complex ion gives blue colour in this reaction? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[{{[CoC{{l}_{6}}]}^{4-}}\]
  done clear
  B)
  \[{{[CoC{{l}_{6}}]}^{3-}}\]
  done clear
  C)
  \[{{[CoC{{l}_{4}}]}^{2-}}\]
  done clear
  D)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer19) Which of the following complex ions has electrons that are symmetrically filled in both \[{{t}_{2g}}\]and \[{{e}_{g}}\] orbitals? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[{{[Co{{F}_{6}}]}^{3-}}\]
  done clear
  B)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
  done clear
  C)
  \[{{[Mn{{(CN)}_{6}}]}^{4-}}\]
  done clear
  D)
  \[{{[Fe{{F}_{6}}]}^{3-}}\]
  done clear
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• question_answer20) Addition of phosphate fertilisers to water  bodies causes : [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   enhanced growth of algae
  done clear
  B)
   increase in amount of dissolved oxygen in water
  done clear
  C)
     deposition of calcium phosphate
  done clear
  D)
     increase in fish population
  done clear
  View Answer play_arrow

• question_answer21) Match the organic compounds in column - I with the Lassaigne's test results in column - II appropriately : [JEE Main Online Paper (Held On 11 April 2015)]  

  Column-I		Column-II
  (A)	Aniline	(i)	Red color with \[FeC{{l}_{3}}\]
  (B)	Benzene sulfonic acid	(ii)	Violet color with sodium nitroprusside
  (C)	Thiourea	(iii)	Blue color with hot and acidic solution of \[FeS{{O}_{4}}\]

   
  A)
   (A) - (ii);  (B) - (i);  (C) - (iii)
  done clear
  B)
   (A) - (iii); (B) - (ii); (B) - (i)
  done clear
  C)
  (A) - (ii); (B) - (iii); (C) - (i)
  done clear
  D)
  (A) - (iii); (B) - (i); (C) - (ii)
  done clear
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• question_answer22) Which of the following pairs of compounds are positional isomers? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-CHO\]and\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]
  done clear
  B)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-CHO\]
  done clear
  C)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  D)
  \[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix}  || \\  O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]and
  done clear
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• question_answer23) The number of structural isomers for\[{{C}_{6}}{{H}_{14}}\]is: [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   3
  done clear
  B)
   4
  done clear
  C)
   5
  done clear
  D)
   6
  done clear
  View Answer play_arrow

• question_answer24) What is the major product expected from the following reaction? Where D is an isotope of Hydrogen. [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer25) In the reaction sequence \[2C{{H}_{3}}CHO\xrightarrow[{}]{O{{H}^{-}}}A\xrightarrow[{}]{\Delta }B;\]the product B is: [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-OH\]
  done clear
  B)
  \[C{{H}_{3}}-CH=CH-CHO\]
  done clear
  C)
  \[C{{H}_{3}}-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]
  done clear
  D)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer26) Which compound exhibits maximum dipole moment among the following? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
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• question_answer27) Which one of the following structures represents the neoprene polymer? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[-{{\left( C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}} \right)}_{n}}-\]
  done clear
  B)
  \[-{{\left( C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  CN \end{smallmatrix}}{\mathop{CH}}\, \right)}_{n}}-\]
  done clear
  C)
  \[-{{\left( C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{CH}}\, \right)}_{n}}-\]
  done clear
  D)
  \[-{{\left( \underset{\begin{smallmatrix}  | \\  {{C}_{6}}{{H}_{5}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}} \right)}_{n}}-\]
  done clear
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• question_answer28) Accumulation of which of the following molecules in the muscles occurs as a result of vigorous exercise? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   Glucose
  done clear
  B)
   Glycogen
  done clear
  C)
   L-lactic acid
  done clear
  D)
   Pyruvic acid
  done clear
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• question_answer29) Which artificial sweetener contains chlorine? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
   Aspartame
  done clear
  B)
   Saccharin
  done clear
  C)
   Sucralose
  done clear
  D)
   Ali tame
  done clear
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• question_answer30) A pink coloured salt turns blue on heating. The presence of which cation is most likely? [JEE Main Online Paper (Held On 11 April 2015)]  
  A)
  \[C{{u}^{2+}}\]
  done clear
  B)
  \[F{{e}^{2+}}\]
  done clear
  C)
  \[Z{{n}^{2+}}\]
  done clear
  D)
  \[C{{o}^{2+}}\]
  done clear
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