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JEE Main · Chemistry · 2015

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1
[JEE Main 2015, 4 April, Q7] Which of the following compounds is not an antacid?
Not attempted
A
Cimetidine
B
Phenelzine
C
Ranitidine
D
Aluminium hydroxide
2
[JEE Main 2015, 4 April, Q11] Which polymer is used in the manufacture of paints and lacquers?
Not attempted
A
Glyptal
B
Polypropene
C
Poly vinyl chloride
D
Bakelite
3
[JEE Main 2015, 4 April, Q19] Which of the vitamins given below is water soluble?
Not attempted
A
Vitamin D
B
Vitamin E
C
Vitamin K
D
Vitamin C
4
[JEE Main 2015, 4 April, Q10] In the reaction shown, the product E is:
Not attempted
A
Structure (A)
B
Structure (B)
C
Structure (C)
D
Structure (D)
5
[JEE Main 2015, 4 April, Q2] In the following sequence of reactions: Toluene→KMnO4A→SOCl2B→BaSO4H2/PdC\text{Toluene}\xrightarrow{\mathrm{KMnO_4}}\text{A}\xrightarrow{\mathrm{SOCl_2}}\text{B}\xrightarrow[\mathrm{BaSO_4}]{\mathrm{H_2/Pd}}\text{C}. The product C is:
Not attempted
A
C6H5CH3\mathrm{C_6H_5CH_3}
B
C6H5CH2OH\mathrm{C_6H_5CH_2OH}
C
C6H5CHO\mathrm{C_6H_5CHO}
D
C6H5COOH\mathrm{C_6H_5COOH}
6
[JEE Main 2015, 4 April, Q17] The synthesis of alkyl fluorides is best accomplished by:
Not attempted
A
Sandmeyer's reaction
B
Finkelstein reaction
C
Swarts reaction
D
Free radical fluorination
7
[JEE Main 2015, 4 April, Q12] The number of geometric isomers that can exist for square planar [Pt(Cl)(py)(NH3)(NH2OH)]+[\mathrm{Pt(Cl)(py)(NH_3)(NH_2OH)}]^+ is: (py\mathrm{py} = pyridine)
Not attempted
A
33
B
44
C
66
D
22
8
[JEE Main 2015, 4 April, Q5] The color of KMnO4\mathrm{KMnO_4} is due to:
Not attempted
A
dd-dd transition
B
L→ML\to M charge transfer transition
C
σ\sigma-σ∗\sigma^* transition
D
M→LM\to L charge transfer transition
9
[JEE Main 2015, 4 April, Q22] Which of the following compounds is not colored yellow?
Not attempted
A
K3[Co(NO2)6]\mathrm{K_3[Co(NO_2)_6]}
B
(NH4)3[As(Mo3O10)4]\mathrm{(NH_4)_3[As(Mo_3O_{10})_4]}
C
BaCrO4\mathrm{BaCrO_4}
D
Zn2[Fe(CN)6]\mathrm{Zn_2[Fe(CN)_6]}
10
[JEE Main 2015, 4 April, Q8] In the context of the Hall-Heroult process for the extraction of Al\mathrm{Al}, which of the following statements is false?
Not attempted
A
Al2O3\mathrm{Al_2O_3} is mixed with CaF2\mathrm{CaF_2} which lowers the melting point of the mixture and brings conductivity
B
Al3+\mathrm{Al^{3+}} is reduced at the cathode to form Al\mathrm{Al}
C
Na3AlF6\mathrm{Na_3AlF_6} serves as the electrolyte
D
CO\mathrm{CO} and CO2\mathrm{CO_2} are produced in this process
11
[JEE Main 2015, 4 April, Q9] Match the catalysts to the correct processes: CatalystProcess(A) TiCl3(i) Wacker process(B) PdCl2(ii) Ziegler-Natta polymerization(C) CuCl2(iii) Contact process(D) V2O5(iv) Deacon’s process\begin{array}{ll}\textbf{Catalyst} & \textbf{Process}\\ \text{(A) }\mathrm{TiCl_3} & \text{(i) Wacker process}\\ \text{(B) }\mathrm{PdCl_2} & \text{(ii) Ziegler-Natta polymerization}\\ \text{(C) }\mathrm{CuCl_2} & \text{(iii) Contact process}\\ \text{(D) }\mathrm{V_2O_5} & \text{(iv) Deacon's process}\end{array}
Not attempted
A
(A)-(ii), (B)-(i), (C)-(iv), (D)-(iii)
B
(A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
C
(A)-(iii), (B)-(i), (C)-(ii), (D)-(iv)
D
(A)-(iii), (B)-(ii), (C)-(iv), (D)-(i)
12
[JEE Main 2015, 4 April, Q16] 3 g3\,\text{g} of activated charcoal was added to 50 mL50\,\text{mL} of acetic acid solution (0.06 N0.06\,\text{N}) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N0.042\,\text{N}. The amount of acetic acid adsorbed (per gram of charcoal) is:
Not attempted
A
36 mg36\,\text{mg}
B
42 mg42\,\text{mg}
C
54 mg54\,\text{mg}
D
18 mg18\,\text{mg}
13
[JEE Main 2015, 4 April, Q13] Higher order (>3>3) reactions are rare due to:
Not attempted
A
increase in entropy and activation energy as more molecules are involved
B
shifting of equilibrium towards reactants due to elastic collisions
C
loss of active species on collision
D
low probability of simultaneous collision of all the reacting species
14
[JEE Main 2015, 4 April, Q15] Two Faraday of electricity is passed through a solution of CuSO4\mathrm{CuSO_4}. The mass of copper deposited at the cathode is: (at. mass of Cu=63.5\mathrm{Cu}=63.5 amu)
Not attempted
A
63.5 g63.5\,\text{g}
B
2 g2\,\text{g}
C
127 g127\,\text{g}
D
0 g0\,\text{g}
15
[JEE Main 2015, 4 April, Q26] The vapour pressure of acetone at 20∘C20^\circ\text{C} is 185 torr185\,\text{torr}. When 1.2 g1.2\,\text{g} of a non-volatile substance was dissolved in 100 g100\,\text{g} of acetone at 20∘C20^\circ\text{C}, its vapour pressure was 183 torr183\,\text{torr}. The molar mass (g mol−1\text{g mol}^{-1}) of the substance is:
Not attempted
A
6464
B
128128
C
488488
D
3232
16
[JEE Main 2015, 4 April, Q24] Sodium metal crystallizes in a body centred cubic lattice with a unit cell edge of 4.29 A˚4.29\,\text{\AA}. The radius of sodium atom is approximately:
Not attempted
A
3.22 A˚3.22\,\text{\AA}
B
5.72 A˚5.72\,\text{\AA}
C
0.93 A˚0.93\,\text{\AA}
D
1.86 A˚1.86\,\text{\AA}
17
[JEE Main 2015, 4 April, Q3] Which compound would give 5-keto-2-methyl hexanal upon ozonolysis?
Not attempted
A
Structure (A)
B
Structure (B)
C
Structure (C)
D
Structure (D)
18
[JEE Main 2015, 4 April, Q23] In Carius method of estimation of halogens, 250 mg250\,\text{mg} of an organic compound gave 141 mg141\,\text{mg} of AgBr\mathrm{AgBr}. The percentage of bromine in the compound is: (at. mass Ag=108\mathrm{Ag}=108; Br=80\mathrm{Br}=80)
Not attempted
A
3636
B
4848
C
6060
D
2424
19
[JEE Main 2015, 4 April, Q25] Which of the following compounds will exhibit geometrical isomerism?
Not attempted
A
3-Phenyl-1-butene
B
2-Phenyl-1-butene
C
1,1-Diphenyl-1-propane
D
1-Phenyl-2-butene
20
[JEE Main 2015, 4 April, Q6] Assertion\textbf{Assertion}: Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason\textbf{Reason}: The reaction between nitrogen and oxygen requires high temperature.
Not attempted
A
Both assertion and reason are correct, but the reason is not the correct explanation for the assertion
B
The assertion is incorrect, but the reason is correct
C
Both the assertion and reason are incorrect
D
Both assertion and reason are correct, and the reason is the correct explanation for the assertion
21
[JEE Main 2015, 4 April, Q14] Which among the following is the most reactive?
Not attempted
A
Br2\mathrm{Br_2}
B
I2\mathrm{I_2}
C
ICl\mathrm{ICl}
D
Cl2\mathrm{Cl_2}
22
[JEE Main 2015, 4 April, Q30] Which one has the highest boiling point?
Not attempted
A
Ne\mathrm{Ne}
B
Kr\mathrm{Kr}
C
Xe\mathrm{Xe}
D
He\mathrm{He}
23
[JEE Main 2015, 4 April, Q28] Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy?
Not attempted
A
BeSO4\mathrm{BeSO_4}
B
BaSO4\mathrm{BaSO_4}
C
SrSO4\mathrm{SrSO_4}
D
CaSO4\mathrm{CaSO_4}
24
[JEE Main 2015, 4 April, Q18] The molecular formula of a commercial resin used for exchanging ions in water softening is C8H7SO3Na\mathrm{C_8H_7SO_3Na} (Mol. Wt. 206206). What would be the maximum uptake of Ca2+\mathrm{Ca^{2+}} ions by the resin when expressed in mole per gram resin?
Not attempted
A
1206\dfrac{1}{206}
B
2309\dfrac{2}{309}
C
1412\dfrac{1}{412}
D
1103\dfrac{1}{103}
25
[JEE Main 2015, 4 April, Q27] From the following statements regarding H2O2\mathrm{H_2O_2}, choose the incorrect statement:
Not attempted
A
It decomposes on exposure to light
B
It has to be stored in plastic or wax lined glass bottles in dark
C
It has to be kept away from dust
D
It can act only as an oxidizing agent
26
[JEE Main 2015, 4 April, Q29] The standard Gibbs energy change at 300 K300\,\text{K} for the reaction 2A⇌B+C2\mathrm{A}\rightleftharpoons\mathrm{B}+\mathrm{C} is 2494.2 J2494.2\,\text{J}. At a given time, the composition of the reaction mixture is [A]=12[\mathrm{A}]=\dfrac12, [B]=2[\mathrm{B}]=2 and [C]=12[\mathrm{C}]=\dfrac12. The reaction proceeds in the: [R=8.314 J/K/molR=8.314\,\text{J/K/mol}, e=2.718e=2.718]
Not attempted
A
reverse direction because Q>KcQ>K_c
B
forward direction because Q<KcQ<K_c
C
reverse direction because Q<KcQ<K_c
D
forward direction because Q>KcQ>K_c
27
[JEE Main 2015, 4 April, Q21] The following reaction is performed at 298 K298\,\text{K}. 2NO(g)+O2(g)⇌2NO2(g)2\mathrm{NO}(g)+\mathrm{O_2}(g)\rightleftharpoons2\mathrm{NO_2}(g) The standard free energy of formation of NO(g)\mathrm{NO}(g) is 86.6 kJ/mol86.6\,\text{kJ/mol} at 298 K298\,\text{K}. What is the standard free energy of formation of NO2(g)\mathrm{NO_2}(g) at 298 K298\,\text{K}? (Kp=1.6×1012K_p=1.6\times10^{12})
Not attempted
A
86600+R(298)ln⁡(1.6×1012)86600+R(298)\ln(1.6\times10^{12})
B
86600−ln⁡(1.6×1012)R(298)86600-\dfrac{\ln(1.6\times10^{12})}{R(298)}
C
0.5[2×86,600−R(298)ln⁡(1.6×1012)]0.5\left[2\times86{,}600-R(298)\ln(1.6\times10^{12})\right]
D
R(298)ln⁡(1.6×1012)−86600R(298)\ln(1.6\times10^{12})-86600
28
[JEE Main 2015, 4 April, Q20] The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:
Not attempted
A
ion-dipole interaction
B
London force
C
hydrogen bond
D
ion-ion interaction
29
[JEE Main 2015, 4 April, Q4] The ionic radii (in A˚\text{\AA}) of N3−\mathrm{N^{3-}}, O2−\mathrm{O^{2-}} and F−\mathrm{F^-} are respectively:
Not attempted
A
1.36, 1.711.36,\ 1.71 and 1.401.40
B
1.71, 1.401.71,\ 1.40 and 1.361.36
C
1.71, 1.361.71,\ 1.36 and 1.401.40
D
1.36, 1.401.36,\ 1.40 and 1.711.71
30
[JEE Main 2015, 4 April, Q1] Which of the following is the energy of a possible excited state of hydrogen?
Not attempted
A
−6.8 eV-6.8\,\text{eV}
B
−3.4 eV-3.4\,\text{eV}
C
+6.8 eV+6.8\,\text{eV}
D
+13.6 eV+13.6\,\text{eV}
Bound states of hydrogen have En=−13.6/n2E_n=-13.6/n^2 eV, so every energy is negative.
Deconstruction\textbf{Deconstruction}: Allowed energies of hydrogen are En=−13.6n2 eVE_n=-\dfrac{13.6}{n^2}\,\text{eV}, n=1,2,3,…n=1,2,3,\dots Strategy\textbf{Strategy}: Check which option equals −13.6/n2-13.6/n^2 for an integer n≥2n\ge2 (excited state). Execution\textbf{Execution}: n=2n=2 gives E2=−13.6/4=−3.4 eVE_2=-13.6/4=-3.4\,\text{eV}. For −6.8-6.8 we would need n2=2n^2=2 (not an integer), and positive energies are unbound states. Verification\textbf{Verification}: n=2n=2 is the first excited state and the only integer match, so −3.4 eV-3.4\,\text{eV} is a possible excited-state energy. Final Answer\textbf{Final Answer}: (B)