1. Class : XII (ABCD)
Time : 3 hour Max. Marks : 243
INSTRUCTIONS
1. The question paper contains 28 questions and 16 pages. Q. No. 1-20 carry3 marks each and Q. No. 21 to
28 carry 5 marks each and all of them are compulsory. There is NEGATIVE marking. 1 mark will be
deductedfor each wrong answer.
Please ensure that the Question Paper you have received contains all the QUESTIONS and
Pages. If you found some mistake like missing questions or pages then contact immediately to the
Invigilator.
2. Indicate the correctanswer for each question byfillingappropriate bubble inyour answer sheet.
3. Use onlyHB pencil fordarkeningthe bubble.
4. Use ofCalculator, LogTable, SlideRule and Mobile is not allowed.
5. TheanswerofthequestionsmustbemarkedbyshadingthecirclesagainstthequestionbydarkHBpencilonly.
6. The answer(s) ofthe questions must bemarked byshading thecircles against the questionbydark HB
pencilonly.
For exampleifonly'B'choice is correct then, thecorrect method for fillingthe bubble is
A B C D
thewrongmethodfor fillingthebubbleare
(i) A B C D
(ii) A B C D
(iii) A B C D
The answer of the questions inwrong or anyothermanner will be treated as wrong.
USEFUL DATA
Atomic weights:Al = 27, Mg = 24, Cu = 63.5, Mn = 55, Cl = 35.5, O = 16, H = 1, P= 31,Ag = 108, N = 14,
Li = 7, I = 127, Cr = 52, K=39, S = 32, Na = 23, C = 12, Br = 80, Fe = 56, Ca = 40, Zn = 65.4,
Radius of nucleus =10–14 m; h = 6.626 ×10–34 Js; me = 9.1 ×10–31 kg, R = 109637 cm–1
PART TEST-1
OBJE CTIVE

2. Select the correct alternative (choose any one)
Q1. Amixture gives three precipitates X,Y, and Z when NH4OH is added in presence of NH4Cl. For the
separationofthesefollowingschemeisfollowed.
Filtrate P, Q, and R are respectively.
(A)Al(OH)3, Fe(OH)3, Cr(OH)3 (B) Fe(OH)3,Al(OH)3, Cr(OH)3
(C) Al(OH)3, Na2CrO4, Fe(OH)3 (D*) NaAlO2, Na2CrO4, FeCl3
[Sol:
So P = NaAlO2
Q = Na2CrO4
R = FeCl3 ]
Q2. What volume of 0.2M Ba(MnO4)2 solution is required for complete oxidation of 25g of 89.6% pure
FeCr2O4 in acidic medium. (Given Fe = 56, Cr = 52, Ba = 137, Mn = 55, O = 16)
(A) 400 ml (B) 200 ml (C*) 350 ml (D) None of these
[Sol:











6
3
2
H
10
n
2
4
7
n
4
2 Cr
Fe
Mn
)
Ba(MnO
O
FeCr
4
2O
FeCr
w = 25
100
6
.
89
 = 22.40
Meq. of FeCr2O4 = Meq. of Ba(MnO4)2
3
10
factor
n
M
W


 = M × n–factor × V

3. 224
4
.
22
× 7 × 103 = 0.2 × 10 × V
V =
2
700
= 350 ml ]
Q3. Consider the reaction
Which ofthefollowingis trueforYand Z.
(A) Y is CF2 = CCl2 and Z is
OEt
CCl
CF
|
2
3  (B) Y is CF3-CHCl2 and Z is CF2 = CCl2
(C*) Y is CF3 – CDCl2 and Z is CF2 = CCl2 (D) Y is CF2 = CCl2 and Z is CF3 – CDCl2
Q4. Column I (Species) Column (II)(Hybridisation)
(I) PCl5 (P) sp2
(II) BrF5 (Q) sp3
(III) NO2
– (R) sp3d2
(IV) SO3
2– (S) sp3d
Choose thecorrect alternative.
I II III IV I II III IV
(A) P S R Q (B) R S Q P
(C) R S P Q (D*) S R P Q
Q5. Which of the followingstatement is correct about O2, O2
+, O2
– and O2
2–
(A) Bond order of O2 is greater than O2
+ whereas less than O2
– and O2
2– and both are paramagnetic.
(B) Bond order of O2
2– is less than that of O2
+ whereas greater than that of O2 and O2
– and O2
2– is
diamagnetic and O2, O2
+ and O2
– are paramagnetic.
(C*) Bond order of O2
+ is greater than that of O2, O2
– and O2
2–, except O2
2– which is diamagnetic, all
other are paramagnetic.
(D) None of these
[Sol. Bond order of
O2 = 2, O2
+ = 2.5, O2
– = 1.5 and O2
2– = 1.0
unpaired electron are present in O2, O2
+ and O2
– whereas in O2
2– all electrons are paired. Hence O2,
O2
+ and O2
– are paramagnetic and O2
2– is diamagnetic.]
Q6. The magnitic moment of two ions Mx+ and My+ ofan element M (Z= 26) is foundto be 5.916 B.M. If
x >ythenwhichof thefollowingstatement is correct
(A) My+ is more stable than Mx+ (B*) Mx+ is more stable than My+
(C) Bothare equallystable (D) None of these
[Sol: M(26) – 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d6
=  
2

n
n = 5.916 B.M.
 n = 5
To have five unpaired electron, M can lose one electron or three electrons to give. My+ and Mx+

4.  My+ i.e. M+ =
and Mx+ i.e., M3+ =
As one can see that 3d5 configuration is more stable than 3d6. So Mx+ i.e., M3+ is more stable.]
Q7. Considerthefollowingmolecules.
(I) (II) (III) (IV) PBr3Cl2
(A)  = 0 for I, II and III only (B)  = 0 for II and III only
(C*)  = 0 for II, III and IV only (D)  = 0 for all the four.
.
Q8. Whichofthefollowingstatementsiscorrect
(A) Powerful nucleophile increases the rate of SN2 howeverit decreases the rate of SN1 reaction.
(B)InEimechanismeliminationaccordingtosaytzeff.
(C*) Rate of solvolysis of is more then that of
(D) None is correct
Q9.





 

O
H
II
NaHCO
aq
I
3
3
)
(
)
( A 

 
  O
H
Br 2
2 B (white ppt. of B)
Compound 'B'is
(A) (B) (C*) (D)
[Sol: 




 

O
H
ii
NaHCO
aq
i
3
3
)
(
.
)
(
on
substituti
ipso
O
H
Br


 
  2
2 1

5. Q10. 


 
  3
2 HNO
HNO A 


 
 O
H
KOH 2
/ B 

 
  O
H
Br 2
2 C 


 
 DMF
SOCl /
2 D
H
O
H
NaOH
2

 
 G
MeI
II
NaH
I
)
(
)
(


 
 F 


 
 O
CO
CF 2
3 )
( E
His usedforthepreparation of"Antileuckemiadrug"His
(A) (B)
(C*) (D)
[Sol: A  B 
C  D 
E  F
G  H  ]

6. Q11. 
 
PhLi
C9H11N 
 
PhLi X
'X' can be
(A*) (B)
(C) (D)
[Sol:  
 
 H
-
Ph
]
Q12.
ne
diazometha
N
CH


 



2
2
X + Y
Y
Both X andYare functional isomers. Both X &Yare
(A) & (B) &
(C*) & (D) &

7. [Sol: Y :  e.g. ofmigratoryaptitude
X: 
 
 2
N 
Q13. Anidealgasissubjectedtothechangeaccordingtothegivencurve,showingthedependenceofpressure
on absolutetemperature for constant moles. When the gas is being heated
(A) compression takes place
(B*) expansion takes place
(C) can't say
(D)neithercompressionnorexpansion
[Sol: (B)
PV = nRT
So slope =
V
nR
from 1 to 2
n  constant & slope decreases so volume increases
so expansion takes place. ]
Q14. Inthefollowingseries ofelectronicallysaturatedandisoelectricions, theobservedX–Obond distances
havebeendetermined:
Ion X–O Bond length (Å)
SiO4
4– 1.63
PO4
3– 1.54
SO4
2– 1.49
ClO4
– 1.46
The order of p–d bond character
(A) SiO4
4– > PO4
3– > SO4
2– > ClO4
–
(B) SiO4
4– > ClO4
– > SO4
4– > PO4
3–
(C*) ClO4
– > SO4
2– > PO4
3– > SiO4
4–
(D) ClO4
– > PO4
3– > SO4
2– > SiO4
2–
For Question No. 15 - 16
For two gasesA& B, Pv/sVisotherm are drawn atTK as shown.TA
&TB
are critical temperatures of
AandB respectively.
Q15. WhichofthefollowingisTRUE?
(A) TA
< T < TB
(B) TA
> T > TB
(C*) TA
> TB
> T
(D) None of the above

8. Q16. The correct statement(s) is (are)
(I) Pressure correctionterm will be morenegligible for gas Bat T K.
(II) The curve for gas B will be of same shape as for gasAifT > TB
(III) gasAwill show same Pv/s V curve as of gas 'B' if T > TA
(A) IIIonly (B*) II and III (C) IIonly (D)all
Q17. The correct order of atomic orbitals in terms of energybetween 8s and 8p orbital are
(A) 7d, 6f (B*) 5g, 6f, 7d (C) 6d, 7f (D) 4h, 5g, 6f, 7d
Q18. ThebondlengthoftheS–Obondismaximuminwhich ofthefollowingcompound.
SOBr2, SOCl2, SOF2
(A) SOCl2 (B*) SOBr2 (C) SOF2 (D)Allhavesamelength
Q.19 For reversible system X(g) Y(g) + Z(g), a quantity of X was heated at constant pressure P at a
certain temperature.Theequilibrium partial pressure ofX was found to beP/7. What is thevalue of Kp
atgiventemperature
(A) 6P/7 (B*) 9P/7 (C) 36P/7 (D) 6P
[Sol: X(g) Y(g) + Z(g)
t = 0 a – –
eq.m a–x x x
ntotal = a + x
x =
4
3a
Kp =
x)
(a
x)
-
(a
P
x2


=
a
16
4
9a2


×
a
7
4
P
=
7
9P
]
Q.20 Whichofthe followinggraphscorrectlyrepresentsthevariationof = V
dP
dV
T
/






 withPforanideal
gas at constant temperature
(A) (B) (C) (D)
[Sol: From PV = RT
P · dV + V·dP = 0
or 





dP
dV
= –
P
V
or  =
P
1
Thus plot of  Vs P gives (A) ]
Select the correct alternative(s) (more than one)
Q1. Inwhichofthefollowingcaseconfigurationabout chiral C*isretained :

9. (A*) 
 
NaH X 
 
 Br
CH3 Y
(B) 
 
 2
SOCl X 

 



Na
MeO Y
(C*) 
 
 3
PCl X 

 



Na
MeO Y
(D) 


 


MeOH
H /
Q2.  

 X A
A





 

O
H
by
followed
MgBr
CH
eq
3
3
.
1
[X]willbe
(A*) + H + (B*) Ph–CH2–Br
(C) HCN (D)
[Sol:   


 
 
O
H3 
aq
in case of Ph–CH2–Br 


 

O
H
MgBr
CH
3
3
]
Q3. In a mass spectrometry experiment, various ions H+, Li+, O2+ & 
3
N were projected with a same
velocityintoasamemagneticfieldzone(allignedperpendiculartothedirectionofvelocity).Thesheeton

10. which theyarestrikingis piercedat certain points (marked as H1, H2 etc.) as shownin thediagram.Itis
known that H+ comes back to zone-I from H2 when projected from H1. Mark out the correct
options.
(A) Out of all remainingions when projected from H1, only 
3
N will comeback to zone-I.
(B*) When all the remainingions were projected from H2, onlyO2+ will comeback in zone-I.
(C*) When all the remaining ions wereprojected from H3, none ofthe them will comeback to zone-I.
(D*) When all the remaining ions wereprojected from H4, none ofthe them will come back to zone-I.
[Sol: r =
qB
mV
 r 
q
m
 diameter (x) 
q
m
For H+
diameter x 
e
mp
x = 1m
For Li+
x 
e
7mp
 x = 7m
For O2+
x 
2e
16mp
 8mp
 x = 8m
For N3
+
x 
2e
42mp
 x = 42 m
So (B), (C) & (D) are correct ]
Q.4 In thefollowingsix electronicconfiguration (remaininginnerorbitals arecompletelyfilled). Mark the
correct option(s).
C–I C–II
C–III C–IV
C–V C–VI
(A*) Stability order : C–II > C–I & C–IV > C–III
(B*) Order of spin multiplicity : C–IV > C–III = C–I > C–II
(C*) C–V violates all the three rules of electronic configuration

11. (D)If C–VI representsAthenA2+ whenkept nearamagnetfaces weak repulsions (actsasdimagnetic).
[Sol. A : excitation possible onlt in d-orbitals
B : Spin multiplicity = 2 | S | + 1 ; | S | = total spin
 the order
C : C–V; Pauli’s violated , Hunds violated &Aufban violated
D : A+2 has two unpaired  paramagnetic
 A, B, C are correct ]
Q.5 Following represents the Maxwell distribution curve for an ideal gas at two temperatures T1 & T2.
Whichofthefollowingoption(s)aretrue?
(A*) Total area under the two curves is independent of moles of gas
(B*) If dU1= f Umps1 & dU2 = f Umps2 then A1 = A2
(C) T1 > T2 and hence higher the temperature, sharper the curve.
(D*) The fraction of molecules having speed = Umps decreases as temperature increases.
[Sol. A : Q area under the curve gives fraction of molecules & hence total area =1
B : From expression of Maxwell distribution fraction of molecules between Umps  Umps
+ f Umps is independent of value of Umps & is dependent only on f.
C : T2 is higher temperature
D : As seen from graph
 A, B, D ]
Q.6 Whichofthefollowingstatement(s)is(are)correct:
(A*) The correct order of reactivitytowards nitration is C6H6 = C6D6 = C6T6
(B*) The correct order of C–O bond length in CO, CO2 and CO3
2– is CO < CO2 < CO3
2–
(C*) The correct order of acidic strength is H3PO4 < H3PO3 < H3PO2
(D) none of these
[Sol: (A)Nitrationofbenzene, dueteroandtritiobenzenedoes not exhibitkineticisotopiceffect.
(B) Resonanceis responsible ]
Q.7 An equilibrium mixture contains 4 moles of PCl5, 2 moles PCl3 and 2 moles of Cl2 at a particular
temperature. 4 moles of N2
is added in the equilibrium mixture. Which of the following are correct
regardingtheaboveequilibrium.
(A*) The value of Kp
does not change on addition of further 4 moles of N2
at constant pressure
(B*)Theequilibrium shift toforwarddirectionwhentemperatureis raised.
(C*) Thereisnoeffectofaddition of further8 moles of N2
atequilibrium at constant volume.
(D)Whenthepressureoftheequilibriummixture is doubled,the degreeofdissociationis also doubled.
Q.8 Whichofthefollowingareincorrectstatements
(A*) KHF2
exist as K+
, H+
and F–
in aqueous solution.
(B*)Thecorrect order of solubilityof Lithium halides isLiF >LiCl >LiBr >LiI
(C) The equivalent mass of Fe2
(S3
)3
, when it is converted to Fe2
O3
and SO4
2–
is
60
M
(where M is molar
mass of Fe2
(S3
)3
)
(D) none of these