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)]
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
doneclear
B)
Thermal proton > Thermal electron Visible photon
doneclear
C)
Visible photon > Thermal electron > Thermal neutron
doneclear
D)
Visible photon > Thermal neutron > Thermal electron
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)]
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)]
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)]
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
doneclear
B)
a decrease in the entropy of the system
doneclear
C)
a shift of the equilibrium in the forward direction
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)]
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)]
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)]
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)]
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)]
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)]
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 \[FeS{{O}_{4}}\]
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\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\overset{\begin{smallmatrix} O \\ || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]
doneclear
B)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-CHO\]
doneclear
C)
\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}}\]and\[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]
doneclear
D)
\[C{{H}_{3}}-C{{H}_{2}}-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{2}}-C{{H}_{3}}\]and
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)]
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)]
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)]
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)]