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Chemistry- CY 2012 GATE Paper (Practice Test)

65 Questions MCQ Test GATE Past Year Papers for Practice (All Branches) | Chemistry- CY 2012 GATE Paper (Practice Test)

Description

Attempt Chemistry- CY 2012 GATE Paper (Practice Test) | 65 questions in 180 minutes | Mock test for GATE preparation | Free important questions MCQ to study GATE Past Year Papers for Practice (All Branches) for GATE Exam | Download free PDF with solutions

QUESTION: 1

Q. 1 – Q. 5 carry one mark each.

Q.

If (1.001)¹²⁵⁹ = 3.52 and (1.001)²⁰⁶² = 7.85, then (1.001)³³²¹ =

A.
2.23
B.
4.33
C.
11.37
D.
27.64

Solution:

QUESTION: 2

One of the parts (A, B, C, D) in the sentence given below contains an ERROR. Which one of the
following is INCORRECT?
I requested that he should be given the driving test today instead of tomorrow.

A.
requested that
B.
should be given
C.
the driving test
D.
instead of tomorrow

Solution:

QUESTION: 3

Which one of the following options is the closest in meaning to the word given below?
Latitude

A.
Eligibility
B.
Freedom
C.
Coercion
D.
Meticulousness

Solution:

QUESTION: 4

Choose the most appropriate word from the options given below to complete the following
sentence:
Given the seriousness of the situation that he had to face, his ___ was impressive.

A.
beggary
B.
nomenclature
C.
jealousy
D.
nonchalance

Solution:

QUESTION: 5

Choose the most appropriate alternative from the options given below to complete the following
sentence:
If the tired soldier wanted to lie down, he ___ the mattress out on the balcony.

A.
should have taken
B.
shall take
C.
should take
D.
will have taken

Solution:

QUESTION: 6

Q. 6 - Q. 10 carry two marks each.

One of the legacies of the Roman legions was discipline. In the legions, military law prevailed
and discipline was brutal. Discipline on the battlefield kept units obedient, intact and fighting,
even when the odds and conditions were against them.

Which one of the following statements best sums up the meaning of the above passage?

A.
Thorough regimentation was the main reason for the efficiency of the Roman legions even in
adverse circumstances.
B.
The legions were treated inhumanly as if the men were animals.
C.
Discipline was the armies’ inheritance from their seniors.
D.
The harsh discipline to which the legions were subjected to led to the odds and conditions being against them.

Solution:

QUESTION: 7

A and B are friends. They decide to meet between 1 PM and 2 PM on a given day. There is a
condition that whoever arrives first will not wait for the other for more than 15 minutes. The
probability that they will meet on that day is

A.
1/4
B.
1/16
C.
7/16
D.
9/16

Solution:

QUESTION: 8

The data given in the following table summarizes the monthly budget of an average household.

The approximate percentage of the monthly budget NOT spent on savings is

A.
10%
B.
14%
C.
81%
D.
86%

Solution:

QUESTION: 9

There are eight bags of rice looking alike, seven of which have equal weight and one is slightly
heavier. The weighing balance is of unlimited capacity. Using this balance, the minimum number
of weighings required to identify the heavier bag is

A.
2
B.
3
C.
4
D.
8

Solution:

QUESTION: 10

Raju has 14 currency notes in his pocket consisting of only Rs. 20 notes and Rs. 10 notes. The total
money value of the notes is Rs. 230. The number of Rs. 10 notes that Raju has is

A.
5
B.
6
C.
9
D.
10

Solution:

QUESTION: 11

Q. 11 – Q. 35 carry one mark each

In the proton decoupled ¹³C NMR spectrum of 7-norbornanone, the number of signals obtained is

A.
7
B.
3
C.
4
D.
5

Solution:

QUESTION: 12

I dentify the most probable product in the given reaction

Solution:

QUESTION: 13

I n the cyclization reaction given below, the most probable product formed is

Solution:

QUESTION: 14

If Δy and Δpy are the uncertainties in the y-coordinate and the y component of the momentum of a
particle respectively, then, according to uncertainty principle ΔyΔpy is ( h=2/2π) and h is Planck’s
constant)

A.
h
B.
> h/2
C.
>h
D.
h/2

Solution:

QUESTION: 15

The average length of a typical α-helix comprised of 10 amino acids is

A.
10 Å
B.
15 Å
C.
36 Å
D.
54 Å

Solution:

QUESTION: 16

Number of thymine residues in a 5000 kb DNA containing 23% guanine residues is

A.
2.70 × 10⁶
B.
2.70 × 10⁷
C.
1.35 x 10⁶
D.
1.35 x 10⁷

Solution:

QUESTION: 17

S hown below is a Hammett plot obtained for the reaction

The change in slope of the plot indicates that

A.
the reaction does not follow linear free energy relationship
B.
electrons are being withdrawn from the transition state in the mechanism
C.
electrons are being donated to the transition state in the mechanism
D.
the mechanism of the reaction is changing

Solution:

QUESTION: 18

The ratio of relative intensities of the two molecular ion peaks of methyl bromide (CH3Br) in the
mass spectrum is

A.
M⁺ : (M+2)⁺ = 1:3
B.
M⁺ : (M+2)⁺ = 3:1
C.
M⁺ : (M+2)⁺ = 1:1
D.
M⁺ : (M+2)⁺ = 1:2

Solution:

QUESTION: 19

A disaccharide that will not give Benedict’s test and will not form osazone is

A.
maltose
B.
lactose
C.
cellobiose
D.
sucrose

Solution:

QUESTION: 20

Choose the allowed transition

Solution:

QUESTION: 21

T he angular part of the wavefunction for the electron in a hydrogen atom is proportional to
. The values of the azimuthal quantum number ( l ) and the magnetic quantum
number (m ) are, respectively

A.
2 and 2
B.
2 and –2
C.
3 and 2
D.
3 and –2

Solution:

QUESTION: 22

L et and denote the wavefunctions of the 2p_x and 2p_z orbitals of carbon, respectively, and

and represent the wavefunctions of the 2p_x and 2p_z orbitals of oxygen, respectively. If c₁ and c₂ are constants used in linear combinations and the CO molecule is oriented along the z axis, then, according to molecular orbital theory, the π-bonding molecular orbital has a wave function given by

Solution:

QUESTION: 23

The bond that gives the most intense band in the infrared spectrum for its stretching vibration is

A.
C-H
B.
N-H
C.
O-H
D.
S-H

Solution:

QUESTION: 24

I f x_A and x_B are the respective mole fractions of A and B in an ideal solution of the two and T_A, T_B,
T are the fusion temperatures of pure A, pure B and the ideal solution respectively, then

Solution:

QUESTION: 25

For a reaction involving two steps given below

assume that the first step attains equilibrium rapidly. The rate of formation of P is proportional to

A.
[G]^1/2
B.
[G]
C.
[G]²
D.
[G]^3/2

Solution:

QUESTION: 26

A metal chelate that can be used for separation and quantitative analysis of aluminium ions by gas
chromatography is

A.
EDTA
B.
ethylene glycol
C.
dinonyl phthalate
D.
trifluoroacetylacetone

Solution:

QUESTION: 27

The enthalpies of hydration of Ca²⁺, Mn²⁺ and Zn²⁺ follow the order

A.
Mn²⁺ > Ca²⁺ > Zn²⁺
B.
Zn²⁺ > Ca²⁺ > Mn²⁺
C.
Mn²⁺ > Zn²⁺ > Ca²⁺
D.
Zn²⁺ > Mn²⁺ > Ca²⁺

Solution:

QUESTION: 28

The number of terminal carbonyl groups present in Fe₂(CO)₉ is

A.
2
B.
5
C.
6
D.
3

Solution:

QUESTION: 29

Among the following substituted silanes, the one that gives cross-linked silicone polymer upon
hydrolysis is

A.
(CH,)₄Si
B.
CH₃SiCl₃
C.
(CH₃)₂SiCl₂
D.
(CH₃)₃SiCl

Solution:

QUESTION: 30

The plot of versus T (where is molar magnetic susceptibility and T is the temperature) for a
paramagnetic complex which strictly follows Curie equation is

Solution:

QUESTION: 31

A mong the following donors, the one that forms most stable adduct with the Lewis acid B(CH₃)₃ is

A.
4-methylpyridine
B.
2,6-dimethylpyridine
C.
4-nitropyridine
D.
2,6-di-tert-butylpyridine

Solution:

QUESTION: 32

T he complex with inverse-spinel structure is

A.
Co₃O₄
B.
Fe₃O₄
C.
MgAlO₄
D.
Mn₃O₄

Solution:

QUESTION: 33

T he IUPAC nomenclature of Na[PCl₆] is

A.
sodium hexachlorophosphine(V)
B.
sodium hexachlorophosphate(V)
C.
sodium hexachlorophosphine
D.
sodium hexachlorophosphite(V)

Solution:

QUESTION: 34

An intermediate formed during the hydroformylation of olefins using Co₂(CO)₈ as catalyst is

A.
HCo(CO)₆
B.
H₄Co(CO)₃
C.
H₂Co(CO)₄
D.
HCo(CO)₄

Solution:

QUESTION: 35

T he order of polarity of NH₃, NF₃ and BF₃ is

A.
NH₃ < NF₃ < BF₃
B.
BF₃ < NF₃ < NH₃
C.
BF₃ < NH₃ < NF₃
D.
NF₃ < BF₃ < NH₃

Solution:

QUESTION: 36

Q. 36 to Q. 65 carry two marks each.

F rom a carboxymethyl-cellulose column at pH 6.0, arginine, valine and glutamic acid will elute in
the order

A.

arginine, valine, glutamic acid
B.
arginine, glutamic acid, valine
C.
glutamic acid, arginine, valine
D.
glutamic acid, valine, arginine

Solution:

QUESTION: 37

S ymmetry operations of the four C₂ axes perpendicular to the principal axis belong to the same
class in the point group(s)

A.
D₄
B.
D_4d
C.
D_4h
D.
D_4h and D_4d

Solution:

QUESTION: 38

A t 298 K, the EMF of the cell

is 0.7530 V. The standard potential of the calomel electrode is 0.2802 V. If the liquid junction
potential is zero, the pH of the solution is

A.
4.7
B.
7.4
C.
8.0
D.
12.7

Solution:

QUESTION: 39

T he wavefunction of a 1-D harmonic oscillator between x =+∞ and x =- ∞ is given by The value of N that normalizes the function ψ (x) is

Solution:

QUESTION: 40

Consider the reaction

H₂ + C₂H₄ → C₂H₆

The molecular diameters of H₂ and C₂H₄ are 1.8 Å and 3.6 Å respectively. The pre-exponential
factor in the rate constant calculated using collision theory in m³ (mole)^-1 s^-1 is approximately
(For this reaction at 300 K, where the symbols have their usual meanings)?

A.
2.5 x 10⁸
B.
2.5 x 10¹⁴
C.
9.4 x 10¹⁷
D.
9.4 x 10²³

Solution:

QUESTION: 41

The molecular partition function of a system is given by

where the symbols have their usual meanings. The heat capacity at constant volume for this system is

A.
3R
B.
6R
C.
9R/2
D.
3R/2

Solution:

QUESTION: 42

C onsider the phase diagram given below.

At the intersection point Q the phases that are in equilibrium are

A.
solid A, solid B and solid AB₂
B.

solid A, solid AB₂ and liquid
C.
solid B, solid AB₂ and liquid
D.
solid A, solid B, solid AB₂ and liquid

Solution:

QUESTION: 43

I dentify the product from the following reaction

(9-BBN = 9-Borabicyclo[3•3•1]nonane)

Solution:

QUESTION: 44

The product from the following reaction is

(Imp: Correct answer will be uploaded soon, Temoparary mark a)

Solution:

QUESTION: 45

T he acid catalyzed cyclization of 5-ketodecan-1,9-diol is given below

The most predominant spiroketal is

Solution:

QUESTION: 46

For a face centered cubic lattice, the Miller indices for the first Bragg’s peak (smallest Bragg angle)
are

A.
0 0 2
B.
1 1 1
C.
0 0 1
D.
1 1 0

Solution:

QUESTION: 47

For the titration of a 10 mL (aq) solution of CaCO₃, 2 mL of 0.001 M Na₂EDTA is required to
reach the end point. The concentration of CaCO₃ (assume molecular weight of CaCO₃ = 100) is

A.
5 x 10^–4g/mL
B.
2 x 10^–4g/mL
C.
5 x 10^–5g/mL
D.
2 x 10^–5g/mL

Solution:

QUESTION: 48

In the reaction

the product formed is

Solution:

QUESTION: 49

In the reaction given below, identify the product

(Correct Answer will be updated soon , Temoprary marked A)

Solution:

QUESTION: 50

C onsider the following pairs of complexes

The electron transfer rate will be fastest in the pair

A.
[CoF(NH₃)₅]²⁺ and [Cr(OH₂)₆]²⁺
B.
[Co(NH₃)₅ (OH₂)]³⁺ and [Cr(OH₂)₆]²⁺
C.
[Co(NH₃)₆]³⁺ and [Cr(OH₂)₆]²⁺
D.
[CoI(NH₃)₅]²⁺ and [Cr(OH₂)₆]²⁺

Solution:

QUESTION: 51

The extent of Mössbauer quadrupole splitting of iron follows the order

A.
FeCl₂•4H₂O > K₂[Fe(CN)₅(NO)] > FeCl₃•6H₂O
B.
K₂[Fe(CN)₅(NO)]>FeCl₂•4H₂O > FeCl₃•6H₂O
C.
FeCl₃•6H₂O > K₂[Fe(CN)₅(NO)]> FeCl₂•4H₂Oa
D.
FeCl₂•4H₂O > FeCl₃•6H₂O > K₂[Fe(CN)₅(NO)]

Solution:

QUESTION: 52

Hemoglobin is an oxygen carrying protein. The correct statement about oxy-hemoglobin is that

A.
the metal is low-spin in +3 oxidation state while dioxygen is in O₂^- form
B.
the metal is high-spin in +3 oxidation state while dioxygen is in O₂^- form
C.
the metal is low-spin in +3 oxidation state while dioxygen is in neutral form
D.
the metal is high-spin in +3 oxidation state while dioxygen is in neutral form

Solution:

QUESTION: 53

If a mixture of NaCl, conc. H₂SO₄ and K₂Cr₂O₇ is heated in a dry test tube, a red vapour (P) is
formed. This vapour (P) dissolves in aqueous NaOH to form a yellow solution, which upon
treatment with AgNO₃ forms a red solid (Q). P and Q are, respectively

A.
CrO₂Cl₂ and Ag₂Cr₂O₇
B.
Na₂[CrOCl₅] and Ag₂CrO₄
C.
Na₂[CrOCl₅] and Ag₂Cr₂O₇
D.
CrO₂Cl₂ and Ag₂CrO₄

Solution:

QUESTION: 54

For the following reaction

A.
10⁵⁰⁰
B.
10³³⁸
C.
10³⁸
D.
10⁸³³

Solution:

QUESTION: 55

The ground states of high-spin octahedral and tetrahedral Co(II) complexes are, respectively

A.
⁴T₂g and ⁴A₂
B.
⁴T₁g and ⁴A₂
C.
³T₁g and ⁴A₂
D.
⁴T₁g and ³T₁

Solution:

QUESTION: 56

The INCORRECT statement about Zeise’s salt is

A.
Zeise’s salt is diamagnetic
B.
The oxidation state of Pt in Zeise’s salt is +2
C.
All the Pt-Cl bond lengths in Zeise’s salt are equal
D.
C-C bond length of ethylene moiety in Zeise’s salt is longer than that of free ethylene
molecule

Solution:

QUESTION: 57

T he number of possible isomers for the square planar mononuclear complex [(NH3)2M(CN)2] of a
metal M is

(Correct Answer will be updated soon, Temprary marked A)

A.
2
B.
4
C.
6
D.
3

Solution:

QUESTION: 58

Common Data for Questions 58 and 59:

Consider the reaction sequence shown below:

TsCl = p-toluenesulfonyl chloride

T he oxidant X used in step 1 is

A.
CrO₃
B.
OsO₄
C.
NaIO₄
D.
m-CPBA followed by NaOH

Solution:

QUESTION: 59

Consider the reaction sequence shown below:

The product is

Solution:

QUESTION: 60

Common Data for Questions 50 and 51:

Consider the E1 reaction of tert-amyl halides from the energy profile given below.

In the above reaction, X = Cl, Br or I. Based on the graph, identify the alkyl halides (R-X) as S1,
S2 and S3

A.
S1 = R-Cl, S2 = R-Br and S3 = R-I
B.
S1 = R-I, S2 = R-Br and S3 = R-Cl
C.
S1 = R-Cl, S2 = R-I and S3 = R-Br
D.
S1 = R-I, S2 = R-Cl and S3 = R-Br

Solution:

QUESTION: 61

Common Data for Questions 50 and 51:

Consider the E1 reaction of tert-amyl halides from the energy profile given below.

I dentify product P₁ and its yield relative to P₂

A.
P₁ is M and is the major product
B.
P₁ is N and is the minor product
C.
P₁ is N and is the major product
D.
P₁ is M and is the minor product

Solution:

QUESTION: 62

Statement for Linked Answer Questions 62 and 63:

A 20491 cm^-1 laser line was used to excite oxygen molecules (made of ¹⁶O only) to obtain the rotational Raman spectrum. The resulting rotational Raman spectrum of oxygen molecule has the first Stokes line at 20479 cm^-1

The rotational constant (usually denoted as B) for the oxygen molecule is