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question_answer1) Which one of the following compounds is an anti-fertility drug?
JEE Main Online Paper (Held On 07 May 2012)
A)
Aspirin
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B)
Chloro my cetin
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C)
Saheli
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D)
Penicillin
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question_answer2) The most basic compound among the following is
JEE Main Online Paper (Held On 07 May 2012)
A)
Acetanilide
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B)
Benzyl amine
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C)
p-Nitro aniline
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D)
Aniline
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question_answer3) A battery is constructed of Cr and \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}.\]The unbalanced chemical equation when such a battery discharges is following: \[N{{a}_{2}}C{{r}_{2}}{{O}_{7}}+Cr+{{H}^{+}}\to C{{r}^{3+}}+{{H}_{2}}O+N{{a}^{+}}\] If one Faraday of electricity is passed through the battery during the charging, the number of moles of \[C{{r}^{3+}}\] removed from the solution is
JEE Main Online Paper (Held On 07 May 2012)
A)
\[\frac{4}{3}\]
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B)
\[\frac{1}{3}\]
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C)
\[\frac{3}{3}\]
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D)
\[\frac{2}{3}\]
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question_answer4) The limiting line in Balmer series will have a frequency of (Rydberg constant, \[{{R}_{\infty }}=3.29\times {{10}^{15}}\]cycles/s)
JEE Main Online Paper (Held On 07 May 2012)
A)
\[8.22\times {{10}^{14}}{{s}^{-1}}\]
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B)
\[3.29\times {{10}^{15}}{{s}^{-1}}\]
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C)
\[3.65\times {{10}^{14}}{{s}^{-1}}\]
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D)
\[5.26\times {{10}^{13}}{{s}^{-1}}\]
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question_answer5) Which of the following cannot be represented by resonance structures?
JEE Main Online Paper (Held On 07 May 2012)
A)
Dimethyl ether
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B)
Nitrate anion
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C)
Carboxylate anion
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D)
Toluene
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question_answer6) Which of the oxide groups among the following cannot be reduced by carbon?
A)
\[C{{u}_{2}}O,Sn{{O}_{2}}\]
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B)
\[CaO,{{K}_{2}}O\]
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C)
\[PbO,F{{e}_{2}}{{O}_{4}}\]
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D)
\[F{{e}_{2}}{{O}_{3}},ZnO\]
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question_answer7) Among the following, the species having the smallest bond is
JEE Main Online Paper (Held On 07 May 2012)
A)
\[N{{O}^{-}}\]
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B)
\[N{{O}^{+}}\]
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C)
\[{{O}_{2}}\]
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D)
NO
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question_answer8) Based on lattice energy and other considerations, which one of the following alkali metal chloride is expected to have the highest melting point?
JEE Main Online Paper (Held On 07 May 2012)
A)
NaCI
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B)
KCl
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C)
LiCI
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D)
RbCl
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question_answer9) The entropy of a sample of a certain substance increases by \[0.836\,J\,{{K}^{-1}}\] on adding reversibly0.3344 J of heat at constant temperature. The temperature of the sample is:
JEE Main Online Paper (Held On 07 May 2012)
A)
2.5K
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B)
0.3K
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C)
0.016K
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D)
0.4K
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question_answer10) The electron affinity of chlorine is 3.7 eV. 1 gram of chlorine is completely converted to \[C{{l}^{-1}}\] ion in a gaseous state. (1 eV = 23.06 kcal \[mo{{l}^{-1}}\]).Energy released in the process is
JEE Main Online Paper (Held On 07 May 2012)
A)
4.8kcal
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B)
7.2kcal
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C)
8.2 kcal
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D)
2.4 kcal
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question_answer11) Copper wire test for halogens is known as
JEE Main Online Paper (Held On 07 May 2012)
A)
Duma's Test
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B)
Beilstein' s Test
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C)
Liebig'sTest
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D)
Lassigne's Test
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question_answer12) For 1 mol of an ideal gas at a constant temperature T, the plot of (log P) against (log V) is a(P: Pressure, V\ Volume)
JEE Main Online Paper (Held On 07 May 2012)
A)
Straight line parallel to x-axis.
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B)
Straight line with a negative slope.
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C)
Curve starting at origin.
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D)
Straight line passing through origin.
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question_answer13) Which one of the following is a chain growth polymerisation?
JEE Main Online Paper (Held On 07 May 2012)
A)
Nucleic acid
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B)
Polystyrene
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C)
Protein
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D)
Starch
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question_answer14) The d-electron configurations of \[C{{r}^{2+}},M{{n}^{2+}},F{{e}^{2+}}\]and \[C{{o}^{2+}}\]are \[{{d}^{4}},{{d}^{5}},{{d}^{6}}\]and \[{{d}^{7}}\] respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. Cr =24, Mn = 25, Fe = 26, Co = 27).
JEE Main Online Paper (Held On 07 May 2012)
A)
\[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
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B)
\[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
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C)
\[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
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D)
\[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
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question_answer15) If x is the mass of the gas adsorbed on mass m of the adsorbent at pressure p, Freundlic had sorption isotherm gives a straight line on plotting
JEE Main Online Paper (Held On 07 May 2012)
A)
\[x/m\,vs\,p\]
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B)
\[x/m\,vs1/\,p\]
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C)
\[\log x/m\,vs\,\log \,p\]
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D)
\[\log x/m\,\,vs\,p\]
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question_answer16) The solubility (in mol\[{{L}^{-1}}\]) of AgCl\[({{K}_{sp}}=1.0\times {{10}^{-10}})\] in a 0.1 M KC1 solution will be
JEE Main Online Paper (Held On 07 May 2012)
A)
\[1.0\times {{10}^{-9}}\]
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B)
\[1.0\times {{10}^{-10}}\]
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C)
\[1.0\times {{10}^{-5}}\]
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D)
\[1.0\times {{10}^{-11}}\]
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question_answer17) Among the following which is the best description of water in the solid phase?
JEE Main Online Paper (Held On 07 May 2012)
A)
Covalent solid
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B)
Molecular solid
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C)
Ionic solid
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D)
Network solid
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question_answer18) All of the following statements apply to proteins except
JEE Main Online Paper (Held On 07 May 2012)
A)
Proteins generally have no definite melting point
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B)
Proteins contain the grouping 'CONH'
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C)
Proteins have high molecular weight
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D)
Proteins can only contain the elements C, H, O and N.
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question_answer19) \[{{K}_{1}},{{K}_{2}}\]and\[{{K}_{3}}\] are the equilibrium constants of the following reactions (I), (II) and (III)respectively: (i)\[{{N}_{2}}+2{{O}_{2}}2N{{O}_{2}}\](ii)\[2N{{O}_{2}}{{N}_{2}}+2{{O}_{2}}\] (iii)\[N{{O}_{2}}\frac{1}{2}{{N}_{2}}+{{O}_{2}}\] The correct relation from the following is
JEE Main Online Paper (Held On 07 May 2012)
A)
\[{{K}_{1}}=\frac{1}{{{K}_{2}}}=\frac{1}{{{K}_{3}}}\]
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B)
\[{{K}_{1}}=\frac{1}{{{K}_{2}}}=\frac{1}{{{({{K}_{3}})}^{2}}}\]
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C)
\[{{K}_{1}}=\sqrt{{{K}_{2}}}={{K}_{3}}\]
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D)
\[{{K}_{1}}=\frac{1}{{{K}_{2}}}={{K}_{3}}\]
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question_answer20) The concentrated sulphuric acid that is peddled commercial is \[95%{{H}_{2}}S{{O}_{4}}\] by weight. If the density of this commercial acid is 1.834 g\[c{{m}^{-3}},\] the molarity of this solution is
JEE Main Online Paper (Held On 07 May 2012)
A)
17.8 M
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B)
12.0 M
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C)
10.5M
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D)
15.7M
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question_answer21) A solid has a 'bcc' structure. If the distance of nearest approach between two atoms is 1.73A,the edge length of the cell is
JEE Main Online Paper (Held On 07 May 2012)
A)
314.20pm
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B)
1.41pm
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C)
200pm
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D)
216pm
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question_answer22) Reaction rate between two substance A and B is expressed as following:\[\text{rate}\,\text{=k }\!\![\!\!\text{ A}{{\text{ }\!\!]\!\!\text{ }}^{\text{n}}}{{\text{ }\!\![\!\!\text{ B }\!\!]\!\!\text{ }}^{\text{m}}}\] If the concentration of A is doubled and concentration of B is made half of initialcon centration, the ratio of the new rate to the earlier rate will be:
JEE Main Online Paper (Held On 07 May 2012)
A)
\[m+n\]
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B)
\[n-m\]
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C)
\[\frac{1}{{{2}^{\left(m+n \right)}}}\]
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D)
\[{{2}^{\left( n-m \right)}}\]
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question_answer23) How many cyclic structures are possible for\[{{C}_{4}}{{H}_{6}}?\]
JEE Main Online Paper (Held On 07 May 2012)
A)
3
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B)
5
done
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C)
6
done
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D)
4
done
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question_answer24) Which is not the correct Statement? (At.nos.\[\text{Ce}=\text{58},\text{Lu}=\text{71},\text{La}=\text{57},\text{Yb}=\text{7}0\])
JEE Main Online Paper (Held On 07 May 2012)
A)
Colour of \[Y{{b}^{3+}}\] ion is pink.
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B)
\[L{{a}^{3+}}\]is diamagnetic.
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C)
\[C{{e}^{4+}}\] has\[{{f}^{0}}\] configuration.
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D)
\[L{{u}^{3+}}\]had\[{{f}^{14}}\] configuration.
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question_answer25) In which of the following arrangements, the sequence is not strictly according to the property written against it?
JEE Main Online Paper (Held On 07 May 2012)
A)
\[C{{O}_{2}}<Si{{O}_{2}}<Sn{{O}_{2}}<Pb{{O}_{2}}\]: increasing oxidising power
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B)
\[N{{H}_{3}}<P{{H}_{3}}<As{{H}_{3}}<Sb{{H}_{3}}\]: increasing basic strength
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C)
\[HF < HCl < HBr < HI\]: increasing acid strength
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D)
\[B<C<O<N\]: increasing first ionization enthalpy.
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question_answer26)
The IUPAC name of the compoundis
JEE Main Online Paper (Held On 07 May 2012)
A)
1,2-Propoxide
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B)
Propylene oxide
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C)
1,2-Oxo propane
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D)
1,2-Epoxy propane
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question_answer27) Green house gases can be arranged in 'Global Warming Potential' sequence as
JEE Main Online Paper (Held On 07 May 2012)
A)
\[{{N}_{2}}O>CFC>C{{H}_{4}}>C{{O}_{2}}\]
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B)
\[CFC>{{N}_{2}}O>C{{H}_{4}}>C{{O}_{2}}\]
done
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C)
\[CFC>C{{O}_{2}}>{{N}_{2}}O>C{{H}_{4}}\]
done
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D)
\[C{{O}_{2}}>CFC>{{N}_{2}}O>C{{H}_{4}}\]
done
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question_answer28) Among the following the order of reactivity towards nucieophilic addition is
JEE Main Online Paper (Held On 07 May 2012)
A)
\[C{{H}_{3}}CHO>C{{H}_{3}}COC{{H}_{3}}>HCHO\]
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B)
\[HCHO>C{{H}_{3}}CHO>C{{H}_{3}}COC{{H}_{3}}\]
done
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C)
\[C{{H}_{3}}CHO>HCHO>C{{H}_{3}}COC{{H}_{3}}\]
done
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D)
\[C{{H}_{3}}COC{{H}_{3}}>C{{H}_{3}}CHO>HCHO\]
done
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question_answer29) \[{{C}_{2}}{{H}_{5}}Br\xrightarrow[{}]{AgCN}X\xrightarrow[Zn-Hg/HCl]{\operatorname{Re}duction}Y,\]Here Y is
JEE Main Online Paper (Held On 07 May 2012)
A)
Ethyl methyl amine
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B)
n-propylamine
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C)
Isopropylamine
done
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D)
Ethylamine
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question_answer30) The ratio of number of oxygen atoms (0) in 16.0 gozone \[({{O}_{3}}),\] 28.0 g carbon monoxide (CO) and16.0 oxygen \[({{O}_{2}})\] is (Atomic mass: C = 12,0 = 16and Avogadro's constant\[{{N}_{A}}=6.0\times {{10}^{23}}mo{{l}^{-1}}\])
JEE Main Online Paper (Held On 07 May 2012)
A)
3:1:2
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B)
1:1:2
done
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C)
3:1:1
done
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D)
1:1:1
done
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