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2007 CY: Chemistry
Duration: Three Hours Maximum Marks: ISO
Read the following instructions carefully.
I. This question paper contains 85 objective type questions. Q.I to Q.20 carry one mark
each and Q.2 I to Q.85 carry two marks each.
2. Attempt all the questions.
3. Questions must be answered on Objective Response Sheet (ORS) by darkening the
appropriate bubble (marked A, B, C, D) using HB pencil against the question number on
the left hand side of the ORS. Each question has only one correct answer. In case you
wish to change an answer, erase the old answer completely.
4. Wrong answers will carry NEGATIVE marks. In Q.l to Q.ZO, 0.25 mark will be
deducted for each wrong answer. In Q.21 to Q.76, Q.78, Q.80, Q.82 and in Q.84, 0.5
mark will be deducted for each wrong answer. However, there is no negative marking in
Q.77, Q.79, Q.81, Q.83 and in Q.85. More than one answer bubbled against a question
will be taken as an incorrect response. Unattempted questions will not carry any marks.
5. Write your registration number, your name and name of the examination centre at the
specified locations on the right half of the ORS.
6. Using HB pencil, darken the appropriate bubble under each digit of your registration
number and the letters corresponding to your paper code.
7. Calculator is allowed in the examination halJ.
8. Charts, graph sheets or tables are NOT allowed in the examination hall.
9. Rough work can be done on the question paper itself. Additionally blank pages are given at the end of the question paper for rough work.
10. This question paper contains 24 printed pages including pages for rough work. Please
check all pages and report, if there is any discrepancy.
51121 FoodlO6-CY-1A CY J/24
Some Useful Data I. Physical Constants
2.
(a) Universal gas constant, R = 8.3145 J K-I mol-I = 0.082 L atm K-I mol-'
(b) Planck constant, h = 6.626 X 10-34 J s
(c) Avogadro number, N = 6.022 X 1023 mol-I
(d) Faraday constant, F = 96500 C mOrl
(e) Electron charge, e = 1.602 x 10-1• C
(I) Speed oflight, c = 2.998 X 108 m 5-1
(g) Boltzmann constant, kb = 1.381 x 10-23 J K-I
Atomic Numbers
8=5 Si = 14
V=23 Cr= 24
Co=27 Ni=28
Eu=63 Dy=66
Lu = 71 Re = 75
CY 2/24
Ti=22
Mn=25
Xe=54
Yb =70
Pt= 78
51121 FoodlO6-CY-1B
Q. 1 - Q. 20 carry ooe mark each.
Q. l The rate of sui phonation of benzene can be significantly enhanced by the use of
(A) a mixture of HNO) and H2S04 (B) conc. H2S04 (C) a solution of SO) in H2S04 (D) S03
Q.2 The reaction
0:0.... 1 + """-"""- 2 Na + 2 C2HsOH
is an example of a
(A) Birch reduction (B) elemmenson reduction (e) Wolff-Kishner reduction (D) hydride reduction
Uq. "H, • 0 ' 'C,H,oN.
Q.3 The major product (X) of the monobromination reaction is
H3C
(A)
~~-O (C)
Br
H,c
NBS ---=-=---;.~ (X)
(B)
H3C
(D) Br
Br
CH3
Q.4 Benzene can not be iodinated with 12 directly. However, in presence of oxidants such as HNO), iodination is possible. The electrophile formed in this case is
(B) (C) (D)
[ r 1 [ .0 .0 ]+ 1········0Hz [
.0 -0 ]+ I········OHz
ey 3124
Q.5 Classify the following species as electrophiles (E) and nucleophiles (N) in routine organic synthesis
SO, Ci+ CH1NH2 H10+ BHl CN-
(A) E = SOl, CI+, BHl (B) E = CI+, H,O+ (C) E = CI+, H,O+, BH, (D) E = SO" CI+, H,O+, BH,
N = CH,NH2, H,O+, CN-N = SO" CH1NH2, BH1, CNN = SOl, CH1NH2, H10+, CW N = CH1NH2, CW
Q.6 The major product obtained upon treatment of compound X with H2S04 at 80°C is
HO (X)
(A) (B)
>0 (C) (D)
~
Q.7 BaTi[Si}09J is a class of
(A) ortho silicate (B) cyclic silicate (C) chain silicate (D) sheet silicate
Q.8 The ground state term for V'+ ion is
(C) lp
Q.9 In photosynthesis, the predominant metal present in the reaction centre of photosystem II is
(Al Zn (B) Cu (C) Mn (D) Fe
Q.IO The octahedral complex I complex ion which shows both facial and meridianal isomers is
(A) Triglycinatocobalt(III) (C) Dichlorodiglycinatocobalt(III)
(B) Tris( ethylenediam ine )cobalt(lII) (D) Trioxalatocobaltate(lII)
Q.II Zn in carbonic anhydrase is coordinated by three histidine and one water molecule. The reaction of C02 with this enzyme is an example of
(A) electrophilic addition (C) nucleophilic addition
(B) electron transfer (D) electrophilic substitution
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Q.12 The difference in the measured and calculated magnetic moment (based on spin-orbit coupling) is observed for
(A) Pm3+
Q.13 For a redox reaction, Cd2+ + 2e- ~ Cd, the (Ep)anodic observed in cyclic
voltametry at hanging mercury drop electrode is -650 mY vs. SCE. The expected value for (Ep)cathod" is
(A) -708 mY (B) -679 mY (C) -650 mY (0) -621 mY
Q.14 The dimension of Planck constant is (M, Land T denote mass, length and time respectively)
Q.15 For a homonuclear diatomic molecule, the bonding molecular orbital is
(A) cru oflowest energy (B) cru of second lowest energy (C) 1Ig of lowest energy (0) 1Iu oflowest energy
Q.16 The selection rules for the appearance of P branch in the rotational-vibrational absorption spectra of a diatomic molecule within rigid rotor- harmonic oscillator model are
(A) Ilv = ± I and 6J = ± 1 (C) ~v = +1 and ~J =-1
(B) ~v = +1 and 6J = +1 (0) Ilv = - 1 and ~J = - I
Q. I 7 The S2 operation on a molecule with the axis of rotation as the z axis, moves a nucleus at (x, y, z) to
(A) (-x, -y, z) (B) (x, -y, -z) (C) (-x, y, -z) (0) (-x, -y, -z)
Q.18 The expression which represents the chemical potential of the ith species (fli) in a mixture (i '" j) is
(A) (aE / an; }s, V,n)
(B) (aH / ani }s, v, nj
(C) (aA / ani }s , v, nl
(0) (aG / ani }s. v, nJ
CY 5124
Q.19 Which of the following statements is NOT correct for a catalyst?
(A) It increases the rate of a reaction (B) It is not consumed in the course of a reaction (C) It provides an alternate pathway for the reaction (0) It increases the activation energy of the reaction
Q.20 The value of the rate constant for the gas phase reaction 2N~ + F2 --. 2N02F is 38 dm) mol-I S-I at 300K. The order of the reaction is
(A) 0 (B) I (C) 2 (0) 3
Q. 21 to Q. 75 carry two marks each.
Q.21 Boric acid in aqueous solution in presence of glycerol behaves as a strong acid due to the formation of
(A) an anionic metal-chelate (B) borate anion (C) glycerate ion (0) a charge transfer complex
Q.22 Match the compounds in List I with the corresponding structure / property given in List II
(A) a- iii (B) a- iv (C) a- iii (0) a- iv
List I (a) (Ph)P»)RhCI (b) LiC6 (c) PtF6 (d) Ni)S.
b-i c-ii b-ii c- iii b-ii c-i b - iii c-ii
d- iv d- i d- iv d- i
List II (i) Spinel (ii) Intercalation (iii) Oxidising agent (iv) Catalyst for alkene hydrogenation
Q.23 W(CO)6 reacts with MeLi to give an intermediate which upon treatment with CH2N2 gives a compound X. X is represented as
(A) WMe6 (C) (CO),W=C(Me)OMe
(B) (CO),W-Me (0) (CO), W "CMe
Q.24 Considering the quadrupolar nature of M-M bond in [Re2Claf-, the M-M bond order in [Re2Ci.(PMe2Ph).r and [Re,CI.(PMe2Ph).] respectively are
(A) 3.0 and 3.0 (B) 3.0 and 3.5 (C) 3.5 and 3.5 (0) 3.5 and 3.0
CY 6/24
Q.25 A student recorded a polarogram of 2.0 mM Cd2+ solution and forgot to add KCI solution. What type of error do you expect 1n his results?
(A) Only migration current will be observed (B) Only diffusion current will be observed (C) Both migration current as well as diffusion current will be observed (D) Both catalytio current as well as diffusion current will be observed
Q.26 The separation of trivalent lanthanide ions, Lu3+, Vb3+, Oy3+, Eu3+ can be effectively done by a cation exchange resin using ammonium a-hydroxy isobutyrate as the eluent. The order in which the ions will be separated is
(A) (8) (C) (D)
Lu3+ Yb3+ Oy3+ Eu3+ , , , E 3+ 0 3+ Yb3+ L 3+ U , y, ) u o 3+ Yb3+ Eu3+ Lu3+ y, , , Yb3+ Oy3+ Lu3+ Eu3+ , , ,
Q.27 Arrange the following metal complexes in order of their increasing hydration energy
(A) P < S < Q < R (B) P < Q < R <S (C) Q < P < R < S (0) S < R < Q < P
Q.28 In the complex, [Nh('1'-Cph(COhJ. the IR stretching frequency appears at 1857 cm-' (strong) and 1897 em" (weak). The valence electron count and the nature of the M-CO bond respectively are
(A) 16 e-, bridging (B) 17e-, bridging (C) 18 e-, terminal (D) 18 e-, bridging
Q.29 The correct classification of[B,H,]2-, BsH9 and B,H 11 respectively is
(A) c1oso. arachno, nido (C) c1oso, nido, arachno
(B) arachno, c1oso, nido (D) nido, arachno, c1oso
Q.30 The compounds X and Y in the following reaction are
EtOH. (X)
(A) X = (Et)2P(S)SH ; Y = (Et)2P(S)CI (8) X = (EtO)2P(S)SH ; Y = (EtO)2P(S)CI (C) X = (EtO)2PSH ; Y = (EIO)2PCI (D) X = (Et)3PO ; Y = (Et)3PCI
CY 7/24
Q.31 Consider the reactions
I. [Cr(H,O)6]2+ + [CoCI(NH,),]'+ --> [Co(NH,),(H,O)]'+ + [CrCl(H,O),]'+ 2. [Fe(CN)6]'- + [Mo(CNls]'---> [Fe(CN)6]'- + [Mo(CNls]4-
Which one of the following is the correct statement?
(i) Both involve an inner sphere mechanism (ii) Both invol ve an outer sphere mechanism (iii) Reaction I follows inner sphere and reaction 2 follows outer sphere mechanism (iv) Reaction I follows outer sphere and reaction 2 follows inner sphere mechanism
(A) i (B) ii (C) iv (D) iii
Q.32 The pair of compounds having the same hybridization for the central atom is
(A) XeF4 and [SiF6]'(C) Ni(CO). and XeO,F,
(B) [NiCI4]'- and [PtCI4]'-(D) [CO(NH')6]'+ and [CO(H,O)6]'+
Q.33 In the reaction shown below, X and Y respectively are
(A) [Mn(CO)4f-. [CH,C(O)Mn(CO)'r (B) [Mn(CO),r, CH,C(O)Mn(CO), (C) [Mn(CO),r, CIMn(CO), (D) [Mn(CO)4]'-, [CIMn(CO),r
Q.34 The Lewis acid character ofBF" BCI, and BBr, follows the order
(A) BF, < BBr, < BC" (C) BF, < BCI, < BBr,
(B) BC" < BBr, < BF, (D) BBr, < BCI, < BF,
Q.3S The compound which shows Lf-M charge transfer is
(A) Ni(CO), (C) HgO
Q.36 The reaction of [PtCI4]'- with NH, gives rise to
(A) [PtCI4(NH,h]'(C) [PtCI,(NH,),]
Q.37 Zeise's salt is represented as
(A) H,PtCI6 (C) [ZnCI,f-
(B) Irans-[PtCI2(NH,h] (D) cis-[PtCI,(NH)h]
(B) [PtCI,]'-(D) [PtCb(,, ' -C,H4)r
Q.38 The catalyst used in the conversion of ethylene to acetaldehyde using Wacker process is
(A) HCo(CO). (C) V,O,
(B) [PdCI,l'-(D) TiCI, in the presence of AI(C,H,»)
CY 8124
0.39 The temperature of 54 g of water is raised from 15°C to 75°C at constant pressure. The change in the enthalpy of the system (given that CPo m of water = 75 JK-' mol-') is
(A) 4.5 kJ (8) 13.5 kJ (C) 9.0 kJ (0) 18.0 kJ
0.40 The specific volume of liquid water is 1.0001 mL g-' and that of ice is 1.0907 mL g-' at O°C. If the heat of fusion of ice at this temperature is 333.88 J g-', the rate of change of melting point of ice with pressure in deg atm-' will be
(A) - 0.0075 (8) 0.0075 (C) 0.075 (0) - 0.075
0.41 Given that Eo(FeJ+, Fe)= -0.04 V and Eo(Fe2
+, Fe) = -0.44 V, the value of Eo(F e3
., F e2+) is
(A) 0.76 V (8) - 0.40 V (C) - 0.76 V (D) 0.40 V
0.42 For the reaction P + 0 + R -4 S, experimental data for the measured initial rates is given below
Expt. Initial conc. P Initial cone. 0 Initial conc. R Initial rate (M) (M) (M) (M s-')
I 0.2 0.5 0.4 8.0 x 10-5
2 0.4 0.5 0.4 3.2x 10-4 3 0.4 2.0 0.4 1.28 x 10-3
4 0.1 0.25 1.6 4.0 x 10-5
The order of the reaction with respect to P, 0 and R respectively is
(A) 2,2, I (8) 2, 1,2 (C) 2, I, I (D) I, 1,2
0.43 Sucrose is converted to a mixture of glucose and fructose in a pseudo first order process under alkaline conditions. The reaction has a half life of28.4 min. The time required for the reduction of a 8.0 mM sample of sucrose to 1.0 mM is
(A) 56.8 min. (8) 170.4 min. (C) 85.2 min. (0) 227.2 min.
CY 9124
S/121 FoodlO6-CY- 2A
Q.44 The reaction
proceeds via the following steps
(A) 2kb [NO] [0,] (C) 2kb [NO]' [0, ]
(B) (2k,kb[N0]' [O,]) I (k.+ kb[O,]) (D) k.[NOf[O, ]
Q.45 40 millimoles ofNaOH are added to 100 mL ofa 1.2 M HA andY M NaA buffer resulting in a solution of pH 5.30. Assuming that the volume of the buffer remains unchanged , the pH of the buffer (KHA = 1.00 x 10-') is
(A) 5.30 (B) 5.00 (C) 0.30 (D) 10.30
Q.46 The entropy of mixing of 10 moles of helium and 10 moles o(oxygen at constant temperature and pressure, assuming both to be ideal gases, is
(A) 115 .3 JK- 1 (B) 5.8 JK- 1 (C) 382.9 JK- 1 (D) 230.6 JK-1
Q.47 The ionisation potential of hydrogen atom is 13.6 eV. The first ionisation potential of a sodium atom, assuming that the energy of its outer electron can be represented by a H-atom like model with an effective nuclear charge of 1.84, is
(A) 46.0 eV (B) I J.S eV (C) 5.1 eV (D) 2.9 eV
Q.48 The quantum state of a particle moving in a circular path in a plane is given by
'f'.,(¢) = (I 1 &)e,ml ,m = O,t 1, ±2, ....
When a perturbation H1= P cos ¢ is applied (P is a constant), what will be the first order correction to the energy of Ihe m" state
(A) a (B) P/(2rr) (C) P/(4rr)
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$/121 Food/06-CY-2B
Q.49 The correct statement(s) among the following islare (i) The vibrational energy levels of a real diatomic molecule are equally spaced. (ii) At 500K, the reaction A ~ B is spontaneous when !>.H ~ 18.83 kJ mor' and
!>.S ~ 41.84 J K-' mol-'. (iii) The process of fluorescence involves transition from a singlet electronic state to
a,~other s inglet electronic state by absorption of light. (iv) When a constant P is added to each of the possible energies of a system, its
entropy remains unchanged.
(A) only i (B) only ii (C) both i and iii (D) both ii and iv
Q.50 Assuming H2 and HD molecules having equal bond lengths, the ratio of the rotational partition functions of these molecules, at temperatures above lOOK is
(A) 3/8 (B) 3/4 (C) 1/2 (D) 2/3
Q.51 N non interacting molecules are distributed among three non degenerate energy levels eo~ 0, &, ~ 1.38 X 10-2
' J and &2~2.76 x 10- 2' J at lOOK. If the average total energy
of the system at this temperature is 1.38 x 10-18 J, the number o f molecules in the system is
(A) 1000 (B) 1503 (C) 2354 (D) 2987
Q.52 The J ~ 0 ~I rotational transition for ' H79 Br occurs at 500.72 GHz. Assuming the molecule to be a rigid rotor, the J ~ 3 ~ 4 transition occurs at
(A) 50.1 cm-' (8) 66.8 cm-' (C) 16.7 cm-' (D) 83.5 cm-'
Q.53 The rate constants of two reactions at temperature Tare k,(T) and k2(T) and the corresponding activation energies are E, and E2 with E2> E,. When temperature is raised from T, to T2, which one of the following relations is correct?
(A) k,(T,) ~ beT,) k,(T,) beT,)
(C) k,(T,) > beT,) k,(T,) - k,(T,)
(8) k,(T,) > beT,) k,(T,) k,(T,)
(D) k,(T,) < k,(T,) k,(T,) beT,)
Q.54 The number of degrees of freedom for a system consisting ofNaCI(s), Na+(aq) and Cqaq) at equilibrium is
(A) 2 (8) 3 (C) 4 (D) 5
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Q.55 Match the structures in List I with their correct names given in List II
List I (a)
dO"' 0
(b)
C) ~
(c)
CA"", (d)
HO
(e)
(A) a-vii b-ii c-vi (C) a-vii b-ii c-vi
d-iii e-iv d-iii e-v
List II
(i) 2-methyl furan
(ii) Imidazole
(iii) 5-hydroxybenzothiazole
(iv) 2-amino piperidine
(v) 2-amino morpholine
(vi) 2-amino azine (vii) 3-methyl furan (viii) 4-hydroxybenzothiazole
(8) a-vii (D) a-I
b-ii b-ii
c-vi c-vi
d-viii e-Iv d-iii e-iv
Q.56 The result of the reduction of either (R) or (S) 2-methyJcycJohexanone, in separate reactions, using LiAIH. is that the reduction of
(A) the R enantiomer is stereoselective (8) the R enantiomer is stereospecific (C) the S enantiomer is stereospecific (D) both the Rand S enantiomers is stereoselective
CY 12/24
Q.57 The increasing order of basicity among the following is
NIGH,), NIGH,),
(X)
(A) Y<X<Z
Q.58 In the reaction
NIGH,), NIGH,),
H,GO ~ ~
OGH,
#' #'
(V)
(8) Y<Z<X
H,C
C2H'"II,}-sr
C,Hl
(C) X<Z<Y
OH- (aq) •
NIGH,), NIGH,),
~
#'
OGH, (Z)
OGH,
(D) X<Y<Z
if the concentration of both the reactants is doubled, then the rate of the reaction will
(A) remain unchanged (8) quadruple (C) reduce to one fourth (D) double
Q.59 Match the structures in List I with the coupling constant ['H J (Hz)] given in List II
(a)
(b)
(c)
(A) a-i (C) a-iii
b-ii b-ii
List I
c-iii C-I
(8) a-ii (D) a-iii
CY 13/24
List II
(i) - I Hz
(ii) - 10 Hz
(iii) - 15 Hz
b-iii b-i
C-I
c-ii
Q.60 Phenol on react ion with formaldehyde and dimethyl amine mainly gives
(A) (3) OH OH
CH,N(CH3), ~
#
CH,N(CH3"
(C) (D) CHO CHO
~ CH,N(CH3), ~
# #
CH,N(CH3"
Q.61 The mono protonation of adenine (X) in acidic solution CD
0·JYs '" l)-NCD \Y \
H
mainly occurs at
(A) position I (C) position 3
(3) position 2 (D) either position 4 or 5
Q.62 In the following reaction
)IN' __ ---'-hc:..v __ .... (X)
benzophenone H H
(X) and (V) respectively are
(Al i:CH, and cis 1,2 dimethylcyclopropane (3) ':CH, and cis 1,2 dimethylcyclopropane
) ----< .... (V)
(C) i: CH, and a mixture of cis / trans 1,2 dimethylcyclopropane (D) 3:CH, and a mixture of cis / trans 1,2 dimethylcyclopropane
CY 14124
Q.63 The major products obtained upon treating a mixture of
()I-I() .. «!-I"() CH,
with a strongly acidic solution of H2S04 is
(A) H,C
NH,
CH,
(8)
NH,
CH,
(C) H,C H,C NH,
H,N NH,
(D) H,C
H,N f and CH,
H,N
Q.64 Match the observed principal absorbtions in the visible spectrum shown in List I with the bond that shows this absorbtion in List II
List I (a) CI ~ cr(b) n~CI' (c) n, rr(d) rr, rr-
(A) a-i (C) a-ii
b-ii b-i
c-iii c-iv
d-iv d-iii
List II
(il C - C (ii ) C-O (iii) C = 0 (iv) C = C
(8) a-i b-iii (D) a-iv b-ii
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c-ii d-iv c-iii d-i
Q.65 Among the isomers ofe lOH'4 shown,
p Q R s the isomer that can be identified uniquely by mass spectrometry alone is
(A) P (8) Q (C) R (D) S
Q.66 The direction of rotation of the following thermal electrocyclic ring closures
Q.67
o 0> o
respectively is
(A) disrotatory, disrotatory, disrotatory (8) con rotatory, conrotatory, conrotatory (e) disrotatory, disrotatory, con rotatory (D) disrotatory, conrotatory, disrotatory
The molecule(s) that exist as meso structure(s)
~ (Ll
is / are
(A) only M (8) both K and L (C) only L
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(1\1)
(D) only K
Q.68 The stereochemical descriptors for the atoms labeled H, and Hb in the structures H. ~Hb
~ .. ~, ....
HO (X)
respectively are
(A) X-homotopic, Y-enantiotopic and Z-diasterotopic (B) X-enantiotopic, V-homotopic and Z-diasterotopic (C) X-diasterotopic, V-homotopic and Z-enantiotopic (D) X-homotopic, Y -diasterotopic and Z-enantiotopic
HX~Hb " " .. ' CI
(Z)
Q.69 Treatment of the pentapeptide Gly-Arg-Phe-Ala-Ala, in separate experiments, with the enzymes Trypsin, Chymotrypsin and Carboxypeptidase A respectively, gives
Q.70
(A) Gly-Arg + Phe-Ala-Ala ; Gly-Arg-Phe + Ala-Ala; Gly-Arg-Phe-Ala + Ala (B) Gly-Arg-Phe + Ala-Ala; Gly-Arg-Phe + Ala-Ala; Gly-Arg-Phe-Ala + Ala (C) Gly-Arg + Phe-Ala-Ala; GIY-Arg-Phe-Ala + Ala; Gly-Arg-Phe + Ala-Ala (D) Gly-Arg + Phe-Ala-Ala; Gly-Arg-Phe + Ala-Ala; Gly + Arg-Phe-Ala + Ala
Hordenine (X), an alkaloid, undergoes Hoffman degradation to give compound (Y).
HO-Q-,CH2CH2N(CH2h __ (X)
(Y) on treatment with alkaline permanganate gives (Z). Y and Z respectively are
(A) (B) OH OH OCH 3 OCH3
~ ~ ~ ~
~ and ~ ~
and ~
~ eOOH eaOH ---:P (C) (D)
OCH3 OCH3 OCH3 OCH3
~ ~
and ~
and ~
CH 2 COOH ~ eOOH
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Common Data Questions
Common Data for Questions 71,72,73:
Trans I, 2 difluoroethylene molecule has a 2-fold rotational axis, a symmetry plane perpendicular to the rotational axis and an inversion centre.
Q.71 The number of distinct symmetry operations that can be performed on the molecule is
(A) 2 (B) 4 (C) 6 (D) 8
Q.72 The number of irreducible representations of the point group of the molecule is
(A) I (B) 2 (C) 3 (D) 4
Q.73 When two H atoms of the above molecule are also replaced by F atoms, the point group of the resultant molecule will be
(A) C i
Common Data for Questions 74, 75:
Reactivity of aryl amines towards electrophilic aromatic substitution is much higher than that of aliphatic amines. Hence differential reactivity of the amino group is desirable in many reactions.
Q.74 The compound which on reacting with aniline will NOT form an acetanilide is
(A) (B)
(C) (D)
Q.7S Aniline can be distinguished from methylamine by its reaction with
(A) p-toluene sulphonyl chloride 1 KOH (B) (i) NaN02 1 HCI, o-soc eii) alkaline p naphthol (C) Sn 1 HCI (D) acetyl chloride
CY 18/24
Linked Answer Questions: Q.76 to Q.85 carry two marks each.
Linked Answer Questions 76 & 77: Q.76 In the reaction
0 3
W. H20 (X) + Acetone + 2 Formaldehyde
Compound X is
(A) (B) 0
c; H CHO
0
0
(C) (D) 0
H
CHO
H
Q.77 Oxidation of X with chromic acid chiefly gives
(A) (8)
(C) (D)
COOH
CY 19124
(COOH
YCOOH
o
COOH
COOH
Linked Answer Questions 78 & 79:
Q.78 In the reaction
Compound X is
(A) Adenine (C) 2,6 - diaminopurine
(8) Xanthine (D) Adenosine
Q.79 Compound X on treatment with conc. HCI gives
(A) Uric acid (8) Adenine (C) Hypoxanthine (D) Guanine
Linked Answer Questions 80 & 81:
Q.80 The reaction of ammonium chloride with 8Cl l at 140°C followed by treatment with NaBH., gives the product X. The formula of X is
Q.81 Which of the following statement(s) is/are true for X? (i) X is not isoelectronic with benzene. (ii) X undergoes addition reaction with HCI.
(D) [BH-NHln
(iii) Electrophilic substitution reaction on X is much faster than that of benzene. (iv) X undergoes polymerization at 90°C.
(A) i and ii (8) only ii (C) ii and iii (0) i and iv
Linked Answer Questions 82 & 83:
Q.82 Consider a particle of mass m moving in a one-dimensional box under the potential V=O for 0 ;!; x ;!; a and V = <Xl outside the box. When the particle is in its lowest energy state the average momentum «Px» of the particle is
(A) <Px>= 0 h
(8) <Px>=-a
h (C) <Px>=-
2a
h (D) <Px>=-
2,ra
Q.83 The uncertainty in the momentum (t.px) of the particle in its lowest energy state is
(A) t.px=O (8) h
t.px =a
h (C) t.px =-
2a
CY 20/24
h (D) t.px=-
21/"a
Linked Answer Questions 84 & 85:
Q.84 In the mixture obtained by mixing 25.0 mL 1.2 x 10-3 M MnCh and 35.0 mL of 6.0 x 10-4 M KCI solution, the concentrations (M) of Mn2+, K+ and cr ions respectively are
(A) 6.0 x 10-4, 3.0 X 10-4, 1.5 X 10-3
(C) 5.0 X 10-4,3.5 X 10-4, 1.35 X 10-3 (B) 6.0 x 10-4, 3.0 X 10-4,9.0 X 10-4 (D) 5.0 x 10-4,3.5 X 10-4,8.5 X 10-4
Q.85 The activity (M) of Mn2+ions in the above solution is
(A) LOx 10-4 (B) 2.0 x 10-4 (C) 3.0 X 10-4 (D) 4.0 x 10-4
END OF THE QUESTION PAPER
CY 21124
