Preview Objective Chemistry for NEET Vol II by A.K. Singhal, U.K. Singhal (2018)

2XY is given below:
(1)X2 → X + X (fast)
(2) X + Y2
XY + Y (slow)
(3) X + Y → XY (fast)
The overall order of the reaction will be:
(a)2
(b)0
(c)1.5
(d)1



N2 + 3H2
N2 + O2

(a) A : H C—C—CH
—
3
2


OH

— 2
B : H3C—C—CH

SO4

B : H3C—C—CH3
O

2NH3  
2NO  



K1



K2

1
H2 + O2 → H2O  
2

intermediate → product
(A)

O

7. The equilibrium constant of the following are:

6.Predict the correct intermediate and product in the
following reaction:
H2O, H2SO4
HgSO4

B : H3C—C—CH3



OH


5. Which one is the correct order of acidity?
(a)CH CH > CH3 C CH > CH2 CH2 > CH3 CH3
(b)CH CH > CH2 CH2 > CH3 C CH > CH33 CH3
(c)CH33 CH3 > CH2 CH2 > CH33 C CH> CH CH
(d)
CH2 CH2 > CH33 CH CH2 > CH33 C CH >
CH CH

CH

(c) A : H3C—C CH2

SO4

4. The heating of phenyl-methyl ethers with HI produces:
(a)Iodobenzene
(b)Phenol
(c) Benzene
(d) Ethyl chlorides

C

B : H3C—C CH

O

(d) A : H3C—C CH2

3. The element Z = 114 has been discovered recently. It will
belong to which of the following family/group Perodic
Table and electronic configuration?
(a) Carbon family, [Rn] 5f14 6d10 7s2 7p2
(b) Oxygen family, [Rn] 5f14 6d10 7s2 7p4
(c) Nitrogen family, [Rn] 5f14 6d10 7s2 7p6
(d) Halogen family, [Rn] 5f14 6d10 7s2 7p5

H3C

(b) A : H3C—C—CH3

(B)

K3

The equilibrium constant (K) of the reaction:
2NH3 +

5
O
2 2

K

2NO + 3H2O, will be:

(a)K2K33 /K1

(b)K2K3 /K1

(c)K23K3 /K1

(d)K1K33 /K2

8. Which one is the most acidic compound?
(a) OH (b)
OH

NO2
O2N OH
(c)

OH
(d)

ON2

NO2

CH3

9.The correct increasing order of basic strength for the
following compounds is:
NH2
NH
NH

2

(1)

2

(3)

(2)
NO2

CH3


xxiv  ■  2017 Solved Question Paper
(a) 3 < 1 < 2
(c) 2 < 1 < 3

(b) 3 < 2 < 1
(d) 2 < 3 < 1

10. Ionic mobility of which of the following alkali metal
ions is lowest when aqueous solution of their salts are
put under an electric field?
(a)K
(b)Rb
(c)Li
(d)Na
11. The most suitable method of separation of 1 : 1 mixture
of ortho and para-nitrophenols is:

(a)Chromatography
(b)Crystallisation
(c) Steam distillation
(d) Sublimation
12.HgCl2 and I2 both when dissolved in water containing
I– ions the pair of species formed is:
(a)HgI2, I–
(b)HgI42, I3–
–
(c)Hg2I2, I
(d)HgI2, I3–
13. Mixture of chloroxylenol and terpineol acts as:
(a)Antiseptic
(b)Antipyretic
(c)Antibiotic
(d)Analgesic
14. An example of a sigma bonded organometallic compound is:
(a) Grignard’s reagent
(b) Ferrocene
(c)Cobaltocene
(d)Ruthenocene
15. A first order reaction has a specific reaction rate of
10–2 sec–1. How much time will it take for 20g of the
reactant to reduce to 5 g?
(a) 138.6 sec
(b) 346.5 sec
(c) 693.0 sec
(d) 238.6 sec

17. Concentration of the Ag+ ions in a saturated solution of

is solubility product of Ag2C2O4 is 2.2 X 104 mol L1
solubility product of Ag2C2O4 is:
(a)2.66 × 1012
(b)4.5 × 1011
12
(c)5.3 × 10
(d)2.42 × 108
18. In the electrochemical cell:

Zn | ZnSO4 (0.01M) | | CuSO4 (1.0 M) | Cu, the emf
of this Daniel cell is E1. When the concentration of
ZnSO4 is changed to 1.0M and that of CuSO4 changed
to 0.01M, the emf changes to E2. From the followings,
which one is the relationship between E1 and E2?


(Given,

RT
= 0.059)
F

(a)E1 < E2
(b)E1 > E2
(c)E2 = 0 ≠ E1
(d)E1 = E2
19. Which of the following pairs of compounds is isoelectronic
and isostructural?
(a)Tel2, XeF2
(b)IBr2-, XeF2

(c)IF3, XeF2
(d)BeCl2, XeF2
20.  The IUPAC name of the compound
O
O

H–C
is:



(a)5-formylhex-2-en-3-one
(b)5-methyl-4-oxohex-2-en-5-al
(c)3-keto-2-methylhex-5-enal
(d)3-keto-2-methylhex-4-enal
16. Match the interhalogen compounds of column-I with the
21.  Which one is the wrong statement?
geometry in column-II and assign the correct code.
(a) The uncertainty principle is ΔE x Δt ≥ h/4π
(b)
Half filled and fully filled orbitals have greater
Column-I
Column-II
stability due to greater exchange energy, greater
(a)
XX'
(i) T-shape
symmetry and more balanced arrangement.
(c)The energy of 2s orbital is less than the energy of 2p
Pentagonal

(b)
XX'3
(ii)
orbital in case of Hydrogen like atoms.
bipyramidal
h ,
(d)
De-Broglies’s wavelength is given by λ =
where
mv
(c)
XX'5
(iii) Linear
m = mass of the particle, v = group velocity of the
particle.
(d)
XX'7
(iv) Square-pyramidal
22.  Which is the incorrect statement?
(v) Tetrahedral
(a)Density decreases in case of crystals with Schottky’s
defect.
Codes:

(b)
NaCl(s) is insulator, silicon is semiconductor, silver
(a)
(b)
(c)
(d)

is conductor, quartz is piezo electric crystal.
(1) (iii)
(i)
(iv)
(ii)
(c)Frenkel defect is favoured in those ionic compounds
(2) (v)
(iv)
(iii)
(ii)
in which sizes of cation and anions are almost equal.
(3) (iv)
(iii)
(ii)
(i)
(d)FeO0.98 has non stoichiometric metal deficiency
(4) (iii)
(iv)
(i)
(ii)
defect.


2017 Solved Question Paper   ■  xxv
23.  The species, having bond angles of 120° is:
(a)CIF3
(b)NC13
(c)BC13
(d)PH3
24.  For a given reaction, ΔH = 35.5 kJ mol1 and ΔS = 83.6

Jk1 mol1. The reaction is spontaneous at: (Assume that
ΔH and ΔS do not vary with tempearature)
(a) T > 425 K
(b) All temperatures
(c) T > 298 K
(d) T < 425 K
25.  Which of the following is a sink for CO?
(a) Micro organism present in the soil
(b)Oceans
(c)Plants
(d)Haemoglobin
26.  If molality of the dilute solutions is doubled, the value H
of molal depression constant (Kf) will be:
(a)Halved
(b)Tripled
(c)Unchanged
(d)Doubled
27.  Which of the following is dependent on temperature?
(a) Molarity
(b) Mole fraction
(c) Weight percentage
(d) Molality
28.  Which one of the following statements is not correct?
(a)The value of equilibrium constant is changed in the
presence of a catalyst in the reaction at equilibrium
(b) Enzymes catalyse mainly bio-chemical reactions
(c) Coenzymes increase the catalytic activity of enzyme
(d) Catalyst does not initiate any reaction
29. Identify A and predict the type of reaction:

OCH3
NaNH2

A

Br

OCH3
NH2
and elimination addition
reaction

(1)

OCH3
Br

(2)

and cine substitution reaction
OCH3

(3)

and cine substitution reaction

OCH3
(4)

and substitution reaction

NH2

30.  The correct order of the stoichiometries of AgCl formed
when AgNO3 in excess is treated with the complexs:
CoCl3 6NH3, CoCl3.5NH3, CoCl3.4NH3 respectively is:
(a) 3 AgCl, 1 AgCl, 2 AgCl
(b) 3 AgCl, 2 AgCl, 1 AgCl
(c) 2 AgCl, 3 AgCl, 1 AgCl
(d) 1 AgCl, 3 AgCl, 2 AgCl
31.  The correct statement regarding electrophile is:
(a)Electrophile is a negatively charged species and y
can form a bond by accepting a pair of electrons
from another electrophile.
(b)Electrophiles are generally neutral species and can
form a bond by accepting a pair of electrons from a
nucleophile.
(c)
Electrophile can be either neutral or positively
charged species and can form a bond by accepting a
pair of electrons from a nucleophile.
(d)Electrophile is a negatively charged species and can
form a bond by accepting a pair of electrons from a
nucleophile.
32.  A gas is allowed to expand in a well insulated container
against a constant external pressure of 2.5 atm from an
initial volume of 2.50 L to a final volume of 4.50 L. The
change in internal energy ΔU of the gas in joules will be:
(a) – 500J
(b) – 505J
(c) + 505J

(d) 1136.25J
33.  Which of the following reactions is appropriate for converting acetamide to methanamine?
(a) Hoffmamn hypobromamide reaction
(b) Stephens reaction
(c) Gabriels phthalimide synthesis
(d) Carbylamine reaction
34. With respect to the conformers of ethane, which of the
following statements is true?
(a)Bond angle changes but bond length remains same
(b) Both bond angle and bond length change
(c) Both bond angles and bond length remains same
(d) Bond angle remains same but bond length changes
35.  In which pair of ions both the species contain S-S bond?
(a)S4O62, S2O32
(b)S4O72, S2O82
(c)S4O62, S2O72
(d)S2O72, S2O32


xxvi  ■  2017 Solved Question Paper
36. It is because of inability of ns2 electrons of the valence
shell to participate in bonding that:
(a)Sn2+ is oxidising while Pb4+ is reducing
(b)Sn2+ and Pb2+ are both oxidising and reducing
(c)Sn4+ is reducing while Pb4+ is oxidising
(d)Sn2+ is reducing while Pb4+ is oxidising
(In English-4, In Hindi-1)
37.  Correct increasing order for the wavelengths of absorption in the visible region the complexes of Co3+ is:
(a)[Co(H2O)6]3+, [Co(en)3]3+, [Co(NH3)6]3+
(b)[Co(H2O)6]3+, [Co(NH3)6]3+, [Co(en)3]3+

(c)[Co(NH3)6]3+ , [Co(en)3]3+, [Co(H2O)6]3+
(d)[Co(en)3]3+, [Co(NH3)6]3+, [Co(H2O)6]3+
38.  Consider the reactions:
Cu

X
573K
(C2H6O)

Z

A

[Ag(NH3)2]+
Silver mirror
–
OH∆
observed
–
OH∆
Y
O

NH2–NH–C–NH2

Identify A, X, Y and Z
(a)
A-Methoxymethane, X-Ethanol, Y-Ethanoic acid,
Z-Semicarbazide
(b)A-Ethanal,

X-Ethanol,
Y-But-2-enal,
Z-Semicarbazide
(c)A-Ethanol,
X-Acetaldehyde,
Y-Butanone,
Z-Hydrazone
(d)A-Methoxymethane, X-Ethanoic Acid, Y-Acetate
ion, Z-Hydrazine
39. Of the following, which is the product formed when
cyclohexanone undergoes aldol condensation followed
by heating?

(1)

(2)
OH O

O
(3)

(4)
O

O

OH

40. Which Of the Following pairs of species have the same
bond order?

(a)O2, NO+
(b)CN , CO
(c)N2, O2
(d) CO, NO
41. Extraction of gold and silver involes leaching with
CNion. Silver is later recovered by:
(a) distillation
(b) zone refining
(c) displacement with Zn (d) liquation
42.  A 20 litre container at 400 K contains CO2(g) at pressure
0.4 atm and an excess of SrO (neglect the volume of solid
SrO). The volume of the container is now decreased by
moving the movable piston fitted in the container. The
maximum volume of the container, when pressure of
CO2 attains its maximum value, will be:
(Given that: SrCO3(s)
SrO (s) + CO2 (g),
Kp = 1.6 atm)
(a) 10 litre
(b) 4 litre
(c) 2 litre
(d) 5 litre
43. Pick out the correct statement with respect to
[Mn (CN)6]3:
(a) It is sp3d2 hybridised and tetrahedral
(b) It is d2sp3 hybridised and octahedral
(c) It is dsp2 hybridised and square planar
(d) It is sp3d2 hybridised and octahedral
44. The reason for greater range of oxidation states in actinoids is attributed to:
(a) Actinoid contraction

(b) 5f, 6d and 7s levels having comparable energies
(c) 4f and 5d levels being close in energies
(d) The radioactive nature of actinoids
45.  Which of the following statements is not correct:
(a) Ovalbumin is a simple food reserve in egg-white
(b)Blood proteins thrombin and fibrinogen are involved
in blood clotting
(c) Denaturation makes the proteins more active
(d)Insulin maintains sugar level in the blood of a human
body

Answer Keys
1.
11.
21.
31.
41.

(a)
(c)
(c)
(c)
(c)

2.
12.
22.
32.
42.

(c)
(b)
(c)
(b)
(d)

3.
13.
23.
33.
43.

(a)
(a)
(c)
(a)
(b)

4.
14.
24.
34.
44.

(b)
(a)
(a)
(c)
(b)

5.
15.
25.
35.
45.

(a)
(a)
(a)
(a)
(c)

6.
16.
26.
36.

(c)
7. (a)
(a)
17. (c)
(c)
27. (a)
(d, a) 37. (d)

8.
18.
28.
38.

(c)
(b)
(a)
(b)

9.
19.
29.
39.

(c)
(b)
(d)
(a)

10.
20.
30.
40.

(c)
(d)
(b)
(b)


2017 Solved Question Paper   ■  xxvii

Hints and Explanations
1.  SO2 being a reducing agent which can reduce and decolourise KMNO4 into MN2+ as follows:

2KMNO4 + 5SO2 + 2H2O
K2SO4 + 2MnSO4 + 2H2SO4
Colourless

1

HI
SN2

CH3I + C6H5OH
1

CH > CH3 → C CH > CH2 CH2 > CH3CH3
Sp
Sp
Sp2
Sp3
S → 50%
50%
33%
28%

7.  N2 + 3H2
N2 + O2

H 2O
Hg

2+

/H

+

(I)

1
Size of Hydrated Ion

10.  Ionic mobility ∝

Li +− nH 2 O < Na + .nH 2 O < K1+ .nH 2 O < Rb.+ .nH 2 O
Ionic mobility ↑ as Size of Ion ↓



HC

H 3C − C ≡ CH

NO2
‒ I, ‒ R
(II)

CH 3
+I, +R
(III)

CH 3 − C| = CH 2

Tautomerisation

I2

12.  HgCl2

5.  Acidic nature ∝ S% ∝ +I

6. 

>

11.  Steam distillation is used to separete a mixture of ortho
and para nitro phenols.

4.  If is a2 SN2 reaction
CH3OC6H5

>

>

3
= 1.5
2

3.  Z = 114
Electronic configuration of Z = [Rn] 5f146d10 7s27p2
Period = 7th or VIIth
Block = lp

Gp.No = 2 + 2 = IVth (carbon family)

2

2

2. Ordered Reactions is given by slowest step of the
reaction X + Y2
XY + Y
Order =

1

9.  Basic Nature of Amines ∝ +I+R ∝ -I ∝ -R
NH
NH
2
NH

O

HgI2

–

I

–Cl2

I– + I2

I–

HgI4–2

I3–

13. Mixture of Chloroxylenol and terpineol acts as
Antiseptic. There are components of Dettol.
14. 
Grighard Feagent [R-mgx] is a Sigma bonded
Organometallic Compound here.

||

CH 3 − C − CH 3 (B)

OH

2NH3 K1 } Reverse It.
2NO K2

15. 

K=
t=

1

N

2.303
 log10   0
t
NT

2.303
 20 
× log10  
−2
10
 5 

H2 + 2 O2 → H2O K3 } × 3
5

2NH3 + 2 O2

16. On solving t = 138.6 sec.

2NO + 3H2O Kc

XX'
SP


K K3
KC = 2 3
K1

Linear

1

OH

>

>
NO2

XX'3

XX'5

3

3

OH

>
CH3

XX'7

SP d

SP d

SP3 d3

T- Shape

Square
Pyramidal

Pentagenal
bipyramidel

2Ag+ + Cro4 2Ksp= (Ag+)2 [Cro42-]

17.  Ag2 Cro4

8.  Acidic Nature ∝ - I ∝ +I

OH
So ON2 OH
NO2
NO2

3

2.2

= (2.2 × 10-4) 2 ( 2 × 10-4)
= 5.32 × 10-12

2


xxviii  ■  2017 Solved Question Paper

(0.01)
0.059
log10 (1)2
2
–
(1)
0.059
log10 (0.01)2
2
–

18.  E1 = Eo
E2 = Eo

Hence E1 > E2

27.  Molarity ∝

(2)

Molality, Molefraction, Weight percentage don’t depand
upon tempertature.

(3)

19.  Both XeF2 and IBr–2 are Linear in shape:



28.  As Catalyst does not change the value of Keq.

29.  OCH
3
OCH3
KNH
2

F
°
°

Xe

Br
°
°

°
°

°
°

F
Sp3d

I
Br

O
H–C

3-keto 2-methyl he x 4-en 1-al or 4-enal

6

3AgNo3
30.  [Co(NH3)6]Cl3 →
[Cο(ΝΗ3)6 ]3+ + 3AgCl
2AgNo

3
[Cο(ΝΗ3)5 Cl]2+ + 2AgCl
[Co(NH3)5Cl]Cl2 →

4

1

NH

It is a case of Nucleophillic substitution by using
Benzyne as reaction intermediate.

3
2

–KBr

Br

°
°
°
°

Sp3d

20. 

1
Temperature

(1)

AgNo

3
[Cο(ΝΗ3)4 ]Cl]+ + 2AgCl
[Co(NH3)4Cl2]Cl →

56

Hence, 3, 2, 1 AgCl are formed.
21.  In case of Hydrogenic species is:
1s < 2s = 2p < 3s = 3b = 3d
Hence 2s and 2p have same energy for Hydrogenic
species.
22.  As Frankel defect is observed in Ionic Compounds with
low co-ordination number and in which size of cation
and anion differ largely.

23.  As BCl3 is co-planar (Tow Angular) so have 120°



Cl

31. Eletrophile is an e‒ deficient species which may be
positively charged or neutral. It accepts e‒ from e‒ rich
(Nucleophile).
32.  As q = 0 so using Ist law of Thermodynamics.

ΔV = −p. ΔV
= −2.5(4.5 − 2.5) = −5 lit atm
= −5 × 101.3 = − 506.5 Joule
= −505 J
33. 

O
||

CH3 − C− NH 2 + Br2 2 + 4KOH → CH3 NH2 + 2KBr + K2 CO3 + 2H2 O

B 120˚

Cl

Cl

24.  As Both ΔH and ΔS are positive so to keep ΔG = –ve
High Temp is favourable so that process become

spontaneous.

ΔG = ΔH ‒T. ΔS

T>

ΔH
ΔS

35.5 × 1000
=
> 424.6 K
03.6


T > 425K
25.  Microorganisms present in soil acts like a link for Co.
26.  KF ∝ molarity
Hence it remains unchanged or constant

It is called Hoffmann hypbromamide reaction.
34. In Ethane, in both forms staggared, and eclipsed Bond
length and Bond angles remain same.
35.  S4O62–, S2 O32– both contain S-S bonds.

S
O
_ _
O S O
O S

O_

_

(S2O32

)

O

O

S O
_
_ O

(S4O62

36. Due to Inert pair effect
Sn2+ → Reductant
Pb4+ → Oxidant

)


2017 Solved Question Paper   ■  xxix
—
40. As CN and CO both have 14e‒ so using M.O.T the bond
order is 3 and same for both.

]3+, [Co(NH3)6]3+, [Co(H2O)6]3+
37. [Co(CN)3
d (↑) as strongness of ligand decreases.
38. C H O
2 6

Cu ∆
573 K

C2H5OH

CH3CHO
(A)

Ethanal

(Ag (NH3)2)+
∆
OH ‒
Aidol

∆
H2N‒NH CONH2

Silver mirror
(Ag↓)

CH3‒C‒H = CH‒CHO
(Y)
But‒2‒en1‒al

CH3‒CH=N. NH CO NH2
Acetal dehyde Semicarbazone
(Z)

39.

O

O

42. As here maximum press of CO2 = Kp = 1.6 atm.
P1V1 = P2V2
P1V1 0.4 × 20
V2 = P =
= 5 litre
1.6
2
—
43. As in [Mn(CN)6]3– Co·No is 6 and CN being strong
–
2 3
ligand paired up 3d e so it is d sp and Octahedral
Complex.

OH
Aldol cond.
–H2O

H

H

41.‘Zn’ being more reactive easily displaces Ag from
[Ag (CN)2]–.

O

(Aldol)

44. Actioids show more oxidation states ( + 2, + 3, + 4, + 6,
etc.) as 5f, 6d, 7s have comparable energies.
45. As during Denaturation of protein, the reactivity of
protein decreases.