Clinic Class Test 13 C E
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TEST - 13 COURSE NAME : VIKAAS (JA) & VIPUL (JB)
COURSE CODE : CLINIC CLASSES
TARGET : JEE (IITs) 2014 Date : 14-03-2013
Duration : 1 Hour
Max. Marks : 80
Please read the instructions carefully. You are allotted 5 minutes specifically for this purpose.
CHEMISTRY (THERMO CHEMISTRY) INSTRUCTIONS 2.
No additional sheets will be provided for rough work.
3.
Blank paper, clipboard, log tables, slide rules, calculators, cellular phones, pagers and electronic gadgets in any form are not allowed.
4.
The answer sheet, a machine-gradable Objective Response Sheet (ORS), is provided separately.
5.
Do not Tamper / mutilate the ORS or this booklet.
6.
Do not break the seals of the question-paper booklet before instructed to do so by the invigilators.
7.
Write your Name, Roll No. and Sign in the space provide on the back page of this booklet.
B. Filling the bottom-half of the ORS : Use only Black ball point pen only for filling the ORS. Do not use Gel / Ink / Felt pen as it might smudge the ORS. 8.
Write your Roll no. in the boxes given at the top left corner of your ORS with black ball point pen. Also, darken the corresponding bubbles with Black ball point pen only. Also fill your roll no on the back side of your ORS in the space provided (if the ORS is both side printed).
9.
Fill your Paper Code as mentioned on the Test Paper and darken the corresponding bubble with Black ball point pen.
10. If student does not fill his/her roll no. and paper code correctly and properly, then his/her marks will not be displayed and 5 marks will be deducted (paper wise) from the total. 11. Since it is not possible to erase and correct pen filled bubble, you are advised to be extremely careful while darken the bubble corresponding to your answer. 12. Neither try to erase / rub / scratch the option nor make the Cross (X) mark on the option once filled. Do not scribble, smudge, cut, tear, or wrinkle the ORS. Do not put any stray marks or whitener anywhere on the ORS. 13. If there is any discrepancy between the written data and the bubbled data in your ORS, the bubbled data will be taken as final. C. Question paper format and Marking scheme : 14. The question paper consists of 1 parts. The part consists of Two Sections. 15. For each question in Section–I, you will be awarded 3 marks if you darken the bubble(s) corresponding to the correct choice for the answer and zero mark if no bubbled is darkened. In case of bubbling of incorrect answer, minus one (–1) mark will be awarded. 16. For each question in Section–II, you will be awarded 5 marks if you darken the bubble corresponding to the correct answer and zero marks if no bubble is darkened. In case of bubbling of incorrect answer, minus one (–1) mark will be awarded.
DO NOT BREAK THE SEALS WITHOUT BEING INSTRUCTED TO DO SO BY THE INVIGILATOR
A. General : 1. This Question Paper contains 22 questions.
CHEMISTRY
Atomic masses : [H = 1, D = 2, Li = 7, C = 12, N = 14, O = 16, F = 19, Na = 23, Mg = 24, Al = 27, Si = 28, P = 31, S = 32, Cl = 35.5, K = 39, Ca = 40, Cr = 52, Mn = 55, Fe = 56, Cu = 63.5, Zn = 65, As = 75, Br = 80, Ag = 108, I = 127, Ba = 137, Hg = 200, Pb = 207]
SECTION - I
Straight Objective Type This section contains 15 questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out of which ONLY ONE is correct. 1.
The enthalpy of neutralisation of a weak monoacidic base(1M) with strong acid is –56.9 KJ/mol. If the enthalpy of ionisation of weak monoacidic base is 1.8 KJ/mol the ionisation of weak base in its molar solution is [Given that Hneutralisation of strong acid and strong base = –57.3 KJ/mol] (A) 100/3 (B) 200/3 (C) 25% (D) None of these
2.
Under the same condition how many mL of 0.1 M NaOH and 0.05 M H2A (strong diprotic acid) solution should be mixed for a total volume of 100 mL produce the highest rise in temperature : (A) 25 : 75 (B) 50 : 50 (C) 75 : 25 (D) 66.66 : 33.33
3.
Only N2, CO and CO2 gases remain after 0.72 gm of carbon is treated with one litre of air at 27ºC and 4.92 atm pressure. Assume air composition O2 = 20%, N2 = 79% and CO2 = 1% (by volume). The heat evolved (in Kcal) under constant pressure is : Given : C + O2 C+
CO2,
1 O 2 2
(A) 1 kcal
CO,
H = – 100 Kcal/mol H = – 25 Kcal/mol
(B) 2 kcal
(C) 3 kcal
(D) 4 kcal
Space for Rough Work
RESONANCE
JA&JBTEST13140313C0-1
CHEMISTRY
4.
Hfº of HgO (s) is 20 kcal/mol. The mass (in gm) of mercury, which can be liberated if 800 cal of heat is given to excess of HgO (s) is : (A) 8 g (B) 12 g (C) 16 g (D) 20 g
5.
The standard heat of combustion of ethene gas is 330 Kcal mol–1 calculate bond energy( in kcal/ –1 mol) assuming that bond energy of C–H bond is 93.6 KCal mol Given : Hºf for CO2(g) and H2O () are –94.2 and –61 Kcal mol–1 respectively. Heat of atomisation of carbon and hydrogen are 150 and 51.5 Kcal mol–1 respectively. (A) 82 Kcal/mol (B) 92 Kcal/mol (C) 102 Kcal/mol (D) 112 Kcal/mol
6.
A substance XY3 decomposes as :
XY3 The ratio of partial pressure of XY and XY2 in the mixture of gases obtained by decomposition of XY3 g) is 2 : 1. Find the total enthalpy change for the decomposition of 1 mole of XY3. (A) 53.33 kJ/mol (B) 160 kJ/mol (C) 110 kJ/mol (D) 1110.33 kJ/mol 7.
If bond energy of H2, F2 and HF are in the ratio 2 : 1 : 3 and Ha (H2) = 400 kJ/mol. Then Hƒ (HF) is : (A) 0 kJ/mol (B) – 600 kJ/mol (C) – 1200 kJ/mol (D) None of these
Space for Rough Work
RESONANCE
JA&JBTEST13140313C0-2
CHEMISTRY
8.
2Fe +
3 O Fe2O3 2 2
x kJ / mole
2Fe + O2 2FeO
y kJ / mole
The H to form one mole of Fe3O4 from Fe and O2 is : (A)
x +y 2
(B)
2x y 2
(C)
2x y 2
(D)
y 2x 2
9.
One gram of an organic liquid X (molecular mass 78) liberates 160 J of heat on solidification. Hfusion (A) is : (A) 19.2 kJ/mol (B) 12.48 kJ/mol (C) 124.8 kJ/mol (D) None of these
10.
Bond energies are equal to dissociation energies in case of : (A) monoatomic molecules (B) polyatomic molecules (C) diatomic molecules (D) all type of molecules
Space for Rough Work
RESONANCE
JA&JBTEST13140313C0-3
CHEMISTRY
11.
S(rhombic) + O2 SO2,
H = – 297.5 kJ
S(monoclinic) + O2 SO2,
H = – 300 kJ
This data indicates : (A) Rhombic sulphure is yellow in colour (B) monoclinic sulphur is more stable (C) monoclinic sulphur has metallic lustre (D) The process S(rhombic) S(monoclinic) is endothermic 12.
The difference between H and E (on a molar basis) for the combustion of n-octane () at 25°C would be : (A) – 13.6 kJ (B) – 1.14 kJ (C) – 11.15 kJ (D) + 11.15 kJ
13.
Statement-1 : The enthalpy of formation of H2O() is greater than of H2O (g) in magnitude. Statement-2: Enthalpy change is negative for the condensation reaction H2O (g) H2O() (A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1. (B) Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1 (C) Statement-1 is True, Statement-2 is False (D) Statement-1 is False, Statement-2 is True
Space for Rough Work
RESONANCE
JA&JBTEST13140313C0-4
CHEMISTRY
14.
In Haber's process of manufacturing of ammonia : N2(g) + 3H2(g) 2NH3(g) ; H025C = –92.2 kJ Molecule N2(g) H2(g) NH3(g) CP JK-1 mol–1 29.1 28.8 35.1 If CP is independent of temperature, then reaction at 100°C as compared to that of 25°C will be : (A) More endothermic (B) Less endothermic (C) More exothermic (D) Less exothermic
15.
STATEMENT-1 : Heat of neutralization of HCl and NaOH is same as that of H2SO4 with NaOH. STATEMENT-2 : HCl, H2SO4 and NaOH are all strong electrolyte. (A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1. (B) Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1 (C) Statement-1 is True, Statement-2 is False (D) Statement-1 is False, Statement-2 is True
SECTION - II
Multiple Correct Answer Type This section contains 7 questions. Each question has 4 choices (A), (B), (C) and (D) for its answer, out of which ONE OR MORE is/are correct. 16.
In which of the following changes, Hº is always negative : (A) enthalpy of solution (C) enthalpy of reaction
(B) enthalpy of hydrogenation (D) enthalpy of neutralisation
Space for Rough Work
RESONANCE
JA&JBTEST13140313C0-5
CHEMISTRY
17.
18.
The standard heat of combustion of solid boron is not equal to : (A) H°f (B2O3) (B) 1/2 H°f (B2O3) (C) 2H°f (B2O3) The following is (are) endothermic reaction(s) : (A) Combustion of methane. (C) Dehydrogenation of ethane to ethylene.
(D) 1/2 H°f (B2O3)
(B) Decomposition of water (D) Conversion of graphite to diamond.
19.
Enthalpy of polymerisation of ethylene, as represented by the reaction, nCH2=CH2 CH2CH2)n is 100 kJ per mole of ethylene. Given bond enthalpy of C=C bond is 600 kJ mol1, enthalpy of CC bond (in kJ mol) will be : (A) 2940 kcal mol–1 (B) 350 kJ mol–1 (C) 700 kJ mol–1 (D) 1470 kcal mol–1
20.
Heat of hydrogenation of ethene is x1 and that of benzene is x2. Therefore Resonance energy value cannot be : (A) x1 – x2 (B) x1 + x2 (C) 3x1 – x2 (D) x1 – 3x2
21.
C(s, graphite) C(g) , following process is : (A) Hºcombustion (B) Hºformation (C) Hºatomization
(D) Hºsublimation
C (s, graphite) + O2(g) CO2(g) , following process is : (A) Hºcombustion (B) Hºformation (C) Hºatomization
(D) Hºsublimation
22.
Space for Rough Work
RESONANCE
JA&JBTEST13140313C0-6
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