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question_answer1) Which compound would give 5-keto-2-methyl hexanal upon ozonolysis ?
[JEE Main Solved Paper-2015 ]
A)
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B)
done
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C)
done
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D)
done
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question_answer2) Which of the vitamins given below is water soluble ?
[JEE Main Solved Paper-2015 ]
A)
Vitamin E
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B)
Vitamin K
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C)
Vitamin C
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D)
Vitamin D
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question_answer3) Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy ?
[JEE Main Solved Paper-2015 ]
A)
\[BaS{{O}_{4}}\]
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B)
\[SrS{{O}_{4}}\]
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C)
\[CaS{{O}_{4}}\]
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D)
\[BeS{{O}_{4}}\]
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question_answer4)
In the reaction the product E is :
[JEE Main Solved Paper-2015 ]
A)
done
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B)
done
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C)
done
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D)
done
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question_answer5) Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of \[4.29\overset{\text{o}}{\mathop{\text{A}}}\,\]. The radius of sodium atom is approximately :
[JEE Main Solved Paper-2015 ]
A)
\[5.72\overset{\text{o}}{\mathop{\text{A}}}\,\]
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B)
\[0.93\overset{\text{o}}{\mathop{\text{A}}}\,\]
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C)
\[1.86\overset{\text{o}}{\mathop{\text{A}}}\,\]
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D)
\[3.22\overset{\text{o}}{\mathop{\text{A}}}\,\]
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question_answer6) Which of the following compounds is not colored yellow ?
[JEE Main Solved Paper-2015 ]
A)
\[{{(N{{H}_{4}})}_{3}}[As{{(M{{o}_{3}}{{O}_{10}})}_{4}}]\]
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B)
\[BaCr{{O}_{4}}\]
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C)
\[Z{{n}_{2}}[Fe{{(CN)}_{6}}]\]
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D)
\[{{K}_{3}}[Co{{(N{{O}_{2}})}_{6}}\]
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question_answer7) Which of the following is the energy of a possible excited state of hydrogen ?
[JEE Main Solved Paper-2015 ]
A)
- 3.4 eV
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B)
+ 6.8 eV
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C)
+ 13.6 eV
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D)
- 6.8 eV
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question_answer8) Which of the following compounds is not an antacid ?
[JEE Main Solved Paper-2015 ]
A)
Phenelzine
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B)
Ranitidine
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C)
Aluminium hydroxide
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D)
Cimetidine
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question_answer9) The ionic radii (in Å) of \[{{N}^{3-}},{{O}^{2-}}\]and \[{{F}^{-}}\] are respectively :
[JEE Main Solved Paper-2015 ]
A)
1.71, 1.40 and 1.36
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B)
1.71, 1.36 and 1.40
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C)
1.36, 1.40 and 1.71
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D)
1.36, 1.71 and 1.40
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question_answer10) In the context of the Hall-Heroult process for the extraction of Al, which of the following statements is false?
[JEE Main Solved Paper-2015 ]
A)
\[A{{l}^{3+}}\] is reduced at the cathode to form Al
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B)
\[N{{a}_{3}}Al{{F}_{6}}\] serves as the electrolyte
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C)
\[CO\] and \[C{{O}_{2}}\] are produced in this process
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D)
\[A{{l}_{2}}{{O}_{3}}\]is mixed with \[Ca{{F}_{2}}\] which lowers the melting point of the mixture and brings conductivity
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question_answer11) In the following sequence of reactions : Toluene \[\xrightarrow[{}]{KMn{{O}_{4}}}A\xrightarrow[{}]{SOC{{l}_{2}}}B\xrightarrow[BaS{{O}_{4}}]{{{H}_{2}}/Pd}C,\]the product C is:
[JEE Main Solved Paper-2015 ]
A)
\[{{C}_{6}}{{H}_{5}}C{{H}_{2}}OH\]
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B)
\[{{C}_{6}}{{H}_{5}}CHO\]
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C)
\[{{C}_{6}}{{H}_{5}}COOH\]
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D)
\[{{C}_{6}}{{H}_{5}}C{{H}_{3}}\]
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question_answer12) Higher order (>3) reactions are rare due to :
[JEE Main Solved Paper-2015 ]
A)
shifting of equilibrium towards reactants due to elastic collisions
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B)
loss of active species on collision
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C)
low probability of simultaneous collision of all the reacting species
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D)
increase in entropy and activation energy as more molecules are involved
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question_answer13) Which of the following compounds will exhibit geometrical isomerism?
[JEE Main Solved Paper-2015 ]
A)
2-Phenyl-1-butene
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B)
1,1-Diphenyl-1-propane
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C)
1-Phenyl-2-butene
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D)
3-Phenyl-1-butene
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question_answer14)
Match the catalysts to the correct processes:
[JEE Main Solved Paper-2015 ]
Catalyst |
Process |
(a) \[TiC{{l}_{3}}\] |
(i) Wacker process |
(b) \[PdC{{l}_{2}}\] |
(ii) Ziegler - Natta polymerization |
(c) \[CuC{{l}_{2}}\] |
(iii) Contact process |
(d) \[{{V}_{2}}{{O}_{5}}\] |
(iv) Deacon?s process |
A)
(A)-(ii), (B)-(iii), (C)-(iv), (D) -(i)
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B)
(A)-(iii), (B)-(i), (C)-(ii), (D) -(iv)
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C)
(A)-(iii), (B)-(ii), (C)-(iv), (D) -(i)
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D)
(A)-(ii), (B)-(i), (C)-(iv), (D) -(iii)
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question_answer15) The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is:
[JEE Main Solved Paper-2015 ]
A)
London force
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B)
hydrogen bond
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C)
ion- ion interaction
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D)
ion-dipole interaction
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question_answer16) The molecular formula of a commercial resin used for exchanging ions in water softening is \[{{C}_{8}}{{H}_{7}}S{{O}_{3}}Na\] (Mol. wt. 206). \[C{{a}^{2+}}\] ions by the resin when expressed in mole per gram resin ?
[JEE Main Solved Paper-2015 ]
A)
\[\frac{2}{309}\]
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B)
\[\frac{1}{412}\]
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C)
\[\frac{1}{103}\]
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D)
\[\frac{1}{206}\]
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question_answer17) Two Faraday of electricity is passed through a solution of \[CuS{{O}_{4}}.\] The mass of copper deposited at the cathode is : (at. mass of Cu = 63.5 amu)
[JEE Main Solved Paper-2015 ]
A)
2 g
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B)
127 g
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C)
0 g
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D)
63.5 g
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question_answer18) The number of geometric isomers that can exist for square planar \[{{\left[ Pt\left( Cl \right)\left( py \right)\left( N{{H}_{3}} \right)\left( N{{H}_{2}}OH \right) \right]}^{+}}\] is \[\text{(py}\,\text{=}\,\,\text{pyridine):}\]
[JEE Main Solved Paper-2015 ]
A)
4
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B)
6
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C)
2
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D)
3
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question_answer19) Carius method of estimation of halogens, 250 mg of an organic compound gave 141 mg of AgBr. The percentage of bromine in the compound is: (at. mass Ag = 108; Br = 80)
[JEE Main Solved Paper-2015 ]
A)
48
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B)
60
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C)
24
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D)
36
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question_answer20) The colour of \[KMn{{O}_{4}}\] is due to:
[JEE Main Solved Paper-2015 ]
A)
\[L\to M\] charge transfer transition
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B)
\[\sigma \to \sigma *\] transition
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C)
\[M\to L\] charge transfer transition
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D)
\[d-d\] transition
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question_answer21) The synthesis of alkyl fluorides is best accomplished by :
[JEE Main Solved Paper-2015 ]
A)
Finkelstein reaction
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B)
Swarts reaction
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C)
Free radical fluorination
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D)
Sandmeyer's reaction
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question_answer22) 3g of activated charcoal was added to 50mL acetic solution (0.06N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram charcoal) is :
[JEE Main Solved Paper-2015 ]
A)
42 mg
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B)
54 mg
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C)
18 mg
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D)
36 mg
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question_answer23) The vapour pressure of acetone at 200C is 185 torr. When 1.2 g of a non ? volatile substance was dissolved in 100 g of acetone at 200C, its vapour pressure was 183 torr. The molar mass (g mol?1) of the substance is
[JEE Main Solved Paper-2015 ]
A)
128
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B)
488
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C)
32
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D)
64
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question_answer24) Which among the following is the most reactive ?
[JEE Main Solved Paper-2015 ]
A)
\[{{I}_{2}}\]
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B)
\[ICl\]
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C)
\[C{{l}_{2}}\]
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D)
\[B{{r}_{2}}\]
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question_answer25) The standard Gibbs energy change at 300K for the reaction \[2AB+C\]At a given time, the composition of the reaction mixture is\[\left[ A \right]=\frac{1}{2},\left[ B \right]=2\]and \[\left[ C \right]=\frac{1}{2}.\] The reaction proceeds in the : \[[R=8.314J/Kmol,e=2.718]\]
[JEE Main Solved Paper-2015 ]
A)
forward direction because \[Q<{{K}_{C}}\]
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B)
reverse direction because \[Q<{{K}_{C}}\]
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C)
forward direction because \[Q>{{K}_{C}}\]
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D)
reverse direction beacuse \[Q>{{K}_{C}}\]
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question_answer26) Assertion : Nitrogen and oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason : The reaction between nitrogen and oxygen requires high temperature.
[JEE Main Solved Paper-2015 ]
A)
The assertion is incorrect, but the reason is correct
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B)
Both the assertion and reason are incorrect
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C)
Both assertion and reason are correct, and the reason is the correct explanation for the assertion
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D)
Both assertion and reason are correct, but reason is not the correct explanation for the assertion
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question_answer27) Which one has the highest boiling point ?
[JEE Main Solved Paper-2015 ]
A)
Kr
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B)
Xe
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C)
He
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D)
Ne
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question_answer28) Which polymer is used in the manufacture of paints and lacquers ?
[JEE Main Solved Paper-2015 ]
A)
Polypropene
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B)
Poly vinyl chloride
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C)
Bakelite
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D)
Glyptal
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question_answer29) The following reaction is performed at \[298K.2NO(g)+{{O}_{2}}2N{{O}_{2}}(g)\] The standard free energy of formation of \[NO(g)\] is 86.6 kJ/mol at 298 K. What is the standard free energy of formation of \[N{{O}_{2}}(g)\] at 298K? \[\left( {{K}_{p}}=1.6\times {{10}^{12}} \right)\]
[JEE Main Solved Paper-2015 ]
A)
\[86600-\frac{\ln \left( 1.6\times {{10}^{12}} \right)}{R\left( 298 \right)}\]
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B)
\[0.5\left[ 2\times 86,600-R\left( 298 \right)\ln \left( 1.6\times {{10}^{12}} \right) \right]\]
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C)
\[R\left( 298 \right)\ln \left( 1.6\times {{10}^{12}} \right)-86600\]
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D)
\[86600+R\left( 298 \right)\ln \left( 1.6\times {{10}^{12}} \right)\]
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question_answer30) From the following statements regarding \[{{H}_{2}}{{O}_{2}},\] choose the incorrect statement :
[JEE Main Solved Paper-2015 ]
A)
It has to be stored in plastic or wax lined glass bottles in dark
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B)
It has to be kept away from dust
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C)
It can act only as an oxidizing agent
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D)
It decomposes on exposure to light
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