1. PAPER-1
Select the correct alternative. (Only one is correct) [27 × 3 = 81]
There is NEGATIVE marking. 1 mark will be deducted for eachwrong answer.
Q.25 If decomposition reaction X (g) Y(g) + Z(g)follows first order kinetics then the graph ofrate of
formation(R)ofYagainsttimetwillbe
(A) (B) (C*) (D)
Q.26 Whichoneoffollowingrepresentsdifferentmolecules?
(A) and (B*) and
(C) and (D) and
[Sol. (B) is non planar so double bonds are localised ]
Q.27 Whichofthefollowingisanoxidizingagent?
(A*) Mn(CO)5 (B) Fe(CO)5 (C) Mn2(CO)10 (D) Fe2(CO)9
Q.28 Theequilibriumconstant fortheionizationofR–NH2(g)inwateras
R–NH2(g) + H2O(l) l R–NH3
+(aq) + OH–(aq)
is 8 × 10–6 at 25°C. Find the pH of a solution at equilibrium with pressure of R–NH2(g) is 0.5 bar.
[Take log 2.82 = 0.45]
(A) 12.3 (B*)  11.3 (C)  11.45 (D) None
[Sol. 8 × 10–6 =
5
.
0
x2
4 × 10–6 = x2
x = 2 × 10–3
 pOH = 2.7
So, pH = 11.3 ]
Q.29 Whichstatement(s)is/aretrueabout therelation betweenthefollowing compounds?
(a) (b) (c)
(I) a and b are tautomers (II) b and c are resonating structures
(III) a and c are resonating structures (IV) a and c are tautomers
(A*) I & III (B) II & IV (C) I, II & III (D) I & IV

2. Q.30 Select correct statement about given squareplanar complex.
(A)It hasnogeometrical isomer.
(B*) It is opticallyactive because it does not haveplane of symmetry.
(C)It is opticallyinactive becausesquareplanarcomplexes haveplane of symmetry.
(D) It is opticallyactive because it has symmetric carbon.
Q.31 XeF2 (g) + H2(g)  2HF(g) + Xe(g) H° = – 430 kJ
usingthefollowingbondenergies: H–H = 435 kJ/mol
H–F = 565 kJ/mol
Calculate the average bond energyof Xe–F in XeF2.
(A) 267 kJ/mol (B) 562.5 kJ/mol (C*) 132.5 kJ/mol (D) None
[Sol. rH° = [ 2 × x + 435] – 2 × 565
–430 = (2x + 435) – 2 × 565
x = 132.5 kJ/mol ]
Q.32 Arrangethefollowingcarbocationsintheincreasingorderoftheirstability.
(I) (II) (III)
(A*) I > II > III (B) I > II = III (C) I > III > II (D) III > I > II
[Sol. (I) Two benzenoid RS & Two H
(II) Two benzenoid RS & but zero H
(III) Onlyone benzenoid RS zero H ]
Q.33 Thetotal possibleco-ordinationisomers forthefollowingcompounds respectivelyare
[Co(en)3] [Cr(C2O4)3]
[Cu(NH3)4] [CuCl4]
[Ni(en)3] [Co(NO2)6]
(A) 4, 4, 4 (B) 2, 2, 2 (C) 2, 2, 4 (D*) 4, 2, 4
Q.34 Calculate f H° (in kJ/mol) for Cr2O3 from the rG° and the S° values provided at 27°
4Cr(s) + 3O2(g)  2Cr2O3(s) rG° = – 2093.4 kJ/mol
S°(J/K mole) : S°(Cr, s) = 24 ; S°(O2, g) = 205 ; S° (Cr2O3, s) = 81
(A) –2258.1 (B) –946.35 (C*) –1129.05 (D) None
[Sol. rG°= rH° – T·rS°
–2093.4 = rH° – 300 × [ 2 × 81 – 4 × 24 – 3 × 205]
rH° = –2093.4 – 164.7 = –2258.1
rH° = 2 × f H°(Cr2O3, s)
 f H° of Cr2O3 = –
2
1
.
2258
= –1129.05 kJ/mol ]

3. Q.35 Select correct code about complex [Cr(NO2)(NH3)5][ZnCl4]
(I) IUPAC name of the compoundis Pentaammine nitrito-N chromium (III)tetra chlorozincate (II)
(II)Itshows geometricalisomerism
(III)Itshows linkageisomerism
(IV)Itshows co-ordination isomerism
(A) III, IV (B*) I, III & IV (C) II, III & IV (D) I, II, III & IV
Q.36 Whichstatementaboutthefollowingequilibriumis/aretrue?
Ph3C–H +

K
O
Me

l

K
C
Ph3

+ MeOH
(I) The reactionfavours the product formation.
(II)Ph3CK is the dominant anionicspecies in this reaction.
(III) Methanol is the weaker acid in this reaction.
(IV) Thereactionfavours thereactant formation.
(A) I & II (B) I, II & III (C*) IV only (D) III & IV
[Sol. Reaction moves towards weaker acid & base ]
Q.37 Select correct statement(s):
(A)Acidic strengthof HBr > HCl but reverse is true fortheir reducing property
(B) Basic strength of PH3 >AsH3 but reverse is true for their Bond angle
(C*) Dipole moment of CH3Cl > CH3F but reverse is true for their ^
HCH bond angle
(D) 1
a
K offumaric acid is higherthan maleic acid but reverse is true fortheir
2
a
K
Q.38 Which one of following carbonyl compound when treated with dilute acid forms the more stable
carbocation?
(A) 3
3 CH
C
CH
||
O

 (B) (C*) (D) 5
6
5
6 H
C
C
H
C
||
O


[Sol. C will form aromaticcation byattack of Honcarbonyl oxygen.]
Q.39 Select thecorrect coderegardingtotal numberofspaceisomers forthefollowingcompounds:
(I) 

n
2
3 ]
c
b
Ma
[ (II) 

n
3]
)
AB
(
M
[ (III) 

n
2
2
2 ]
c
b
Ma
[
(I) (II) (III)
(A) 4 4 6
(B) 4 3 5
(C) 3 3 5
(D*) 3 4 6
Q.40 Correct order ofheat of combustion is:
(p) 1,3-Pentadiene (q) 1,3-Butadiene
(r)2,3-Dimethyl-1,3-butadiene (s) Propadiene
(A) s > q > p > r (B) s > r > q > p (C*) r > p > q > s (D) s > r > p > q
[Sol. More theno. of C &H in the compound more will be heat of combustion]

4. Q.41 Which of the angle is most influenced bythepresence of lonepair in SF4.
(A*)Equatorialangle (B)axialangle
(C)Anglebetweenaxial andequatorial (D) None
Q.42 Themoststableresonatingstructureoffollowingcompoundis
(A) (B)
(C) (D*)
[Sol. D is octet complete R.S. with–ve on more electronegative atom "O". ]
Q.43 How manygeometrical isomers are possible for [Pd2+ (NH2–CH(CH3)– 
2
CO )2]o
(A) 2 (B) 3 (C*) 4 (D) 6
Q.44 Writecorrect orderofreactivityoffollowinghalogenderivatives.
(I) (II) CH2=CH–Cl (III) Et3C–Cl (IV) PhCH2Cl (V) Ph3C–Cl
(A*) I > V > IV > III > II (B) V > IV > I > III > II
(C) V > I > IV > III> II (D) I > V > III > IV > II
[Sol. ReactivityofR–XincreaseswithdecreaseinBD.E.ofRX&increaseinstabilityofcarbocationformed.]
Q.45 Choosethecorrect optionregardingthefollowingcomplex compound which follows (F)and does not
follow (NF)thesidgwickEANrule:
(I) [(Ph3P)2PdCl2PdCl2] (II) [NiBrCl(en)]
(III) Na4[Fe(CN)5NOS] (IV) Cr(CO)3(NO)2
(I) (II) (III) (IV)
(A) NF NF NF NF
(B) F F NF F
(C*) NF NF F F
(D) NF NF F NF
Q.46 Correct order of basicityis:
(I) (II) (III) (IV)
(A) I > II > III > IV (B) II > I > III > IV (C*) II > III > I > IV (D) II > III > IV > I
[Sol. Me is +H & +I group from o & p positions bySIP at ortho position decreases the basicity ]

5. Q.47 Total number of isomers of [Co(acac)2BrCl]r are
(A) 4 (B*) 3 (C) 6 (D) 2
Q.48 Correctorderofnucleophilicityoffollowinganionsinpolarproticsolventis:
(A*)

3
CH >

2
NH >

OH >

F (B)

3
CH <

2
NH <

OH <

F
(C) 
3
CH = 
2
NH = 
OH = 
F (D)

3
CH >

F >

OH >

2
NH
[Sol. Nucleophilicitydecreaseswithincreasein electronegativityofdonoratom.]