Download GATE 2015 XL H Life Sciences Question Paper

Download Graduate Aptitude Test in Engineering (GATE) 2015 XL H Life Sciences Question Paper

GATE 2015 CHEMISTRY (COMPULSORY) ? XL-H
XL-H 1/3
H: CHEMISTRY (COMPULSORY)
Q. 1 ? Q. 5 carry one mark each.
Q.1 The molecule having net ?non-zero dipole moment? is
(A) CCl
4
(B) NF
3
(C) CO
2
(D) BCl
3



Q.2 The Diels-Alder adduct from the reaction between cyclopentadiene and benzyne is
(A)

(B)

(C)

(D)



Q.3 The number of possible enantiomeric pair(s) in HOOC ?CH(OH) ?CH(OH) ?COOH is________


Q.4
For the electrochemical reaction, Cu
2+
(aq) + Zn(s) ? Cu(s) + Zn
2+
(aq)
the equilibrium constant at 25
o
C is 1.7 ? 10
37
. The change in standard Gibbs free energy ( ?G
o
) for
this reaction at that temperature will be ________ kJ

mol
?1
(up to one decimal place).
(Given: R = 8.314 JK
?1
mol
?1
)


Q.5 Among the following diagrams, the one that correctly describes a zero order reaction
(X ? product) is
(Given: [X]
o
= initial concentration of reactant X; [X] = concentration of reactant X at time t
and t
1/2
= half-life period of reactant X)
(A)

1/[X]
t

(B)

t
1/2
[X]
o

(C)

t
1/2
1/[X]
o

(D)

t
1/2
[X]
o

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GATE 2015 CHEMISTRY (COMPULSORY) ? XL-H
XL-H 1/3
H: CHEMISTRY (COMPULSORY)
Q. 1 ? Q. 5 carry one mark each.
Q.1 The molecule having net ?non-zero dipole moment? is
(A) CCl
4
(B) NF
3
(C) CO
2
(D) BCl
3



Q.2 The Diels-Alder adduct from the reaction between cyclopentadiene and benzyne is
(A)

(B)

(C)

(D)



Q.3 The number of possible enantiomeric pair(s) in HOOC ?CH(OH) ?CH(OH) ?COOH is________


Q.4
For the electrochemical reaction, Cu
2+
(aq) + Zn(s) ? Cu(s) + Zn
2+
(aq)
the equilibrium constant at 25
o
C is 1.7 ? 10
37
. The change in standard Gibbs free energy ( ?G
o
) for
this reaction at that temperature will be ________ kJ

mol
?1
(up to one decimal place).
(Given: R = 8.314 JK
?1
mol
?1
)


Q.5 Among the following diagrams, the one that correctly describes a zero order reaction
(X ? product) is
(Given: [X]
o
= initial concentration of reactant X; [X] = concentration of reactant X at time t
and t
1/2
= half-life period of reactant X)
(A)

1/[X]
t

(B)

t
1/2
[X]
o

(C)

t
1/2
1/[X]
o

(D)

t
1/2
[X]
o

GATE 2015 CHEMISTRY (COMPULSORY) ? XL-H
XL-H 2/3

Q. 6 ? Q. 15 carry two marks each.

Q.6 If the radius of first Bohr orbit is 0.53 ??, then the radius of the third Bohr orbit is
(A) 2.12 ? (B) 4.77 ? (C) 1.59 ? (D) 3.18 ?


Q.7 If 50 mL of 0.02 M HCl is added to 950 mL of H
2
O, then the pH of the final solution will
be________


Q.8 Stability of [CrCl
6
]
3 ?
(X), [MnCl
6
]
3 ?
(Y) and [FeCl
6
]
3 ?
(Z) follows the order
(Given: Atomic numbers of Cr = 24, Mn = 25 and Fe = 26)
(A) X > Y > Z (B) X < Y < Z (C) Y < X < Z (D) X < Y = Z


Q.9 Among the following pairs, the paramagnetic and diamagnetic species, respectively, are
(A) CO and O
2
?

(B) NO and CO
(C) O
2
2 ?
and CO (D) NO
+
and O
2
?



Q.10 In compounds K
4
[Fe(CN)
6
] (P) and Fe(CO)
5
(Q), the iron metal centre is bonded to
(A) C of CN
?
in P and C of CO in Q
(B) N of CN
?
in P and C of CO in Q
(C) C of CN
?
in P and O of CO in Q
(D) N of CN
?
in P and O of CO in Q


Q.11 Among the following reactions, the one that produces achiral alcohol (after hydrolysis) is
(A)

H
3
C H
O
+ CH
3
CH
2
MgBr
(B)

H
3
C Ph
O
CH
3
CH
2
MgBr +
(C)

H
3
C OEt
O
+ CH
3
CH
2
MgBr
(D)

H
3
C
O
+ CH
3
CH
2
MgBr
CH
3

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GATE 2015 CHEMISTRY (COMPULSORY) ? XL-H
XL-H 1/3
H: CHEMISTRY (COMPULSORY)
Q. 1 ? Q. 5 carry one mark each.
Q.1 The molecule having net ?non-zero dipole moment? is
(A) CCl
4
(B) NF
3
(C) CO
2
(D) BCl
3



Q.2 The Diels-Alder adduct from the reaction between cyclopentadiene and benzyne is
(A)

(B)

(C)

(D)



Q.3 The number of possible enantiomeric pair(s) in HOOC ?CH(OH) ?CH(OH) ?COOH is________


Q.4
For the electrochemical reaction, Cu
2+
(aq) + Zn(s) ? Cu(s) + Zn
2+
(aq)
the equilibrium constant at 25
o
C is 1.7 ? 10
37
. The change in standard Gibbs free energy ( ?G
o
) for
this reaction at that temperature will be ________ kJ

mol
?1
(up to one decimal place).
(Given: R = 8.314 JK
?1
mol
?1
)


Q.5 Among the following diagrams, the one that correctly describes a zero order reaction
(X ? product) is
(Given: [X]
o
= initial concentration of reactant X; [X] = concentration of reactant X at time t
and t
1/2
= half-life period of reactant X)
(A)

1/[X]
t

(B)

t
1/2
[X]
o

(C)

t
1/2
1/[X]
o

(D)

t
1/2
[X]
o

GATE 2015 CHEMISTRY (COMPULSORY) ? XL-H
XL-H 2/3

Q. 6 ? Q. 15 carry two marks each.

Q.6 If the radius of first Bohr orbit is 0.53 ??, then the radius of the third Bohr orbit is
(A) 2.12 ? (B) 4.77 ? (C) 1.59 ? (D) 3.18 ?


Q.7 If 50 mL of 0.02 M HCl is added to 950 mL of H
2
O, then the pH of the final solution will
be________


Q.8 Stability of [CrCl
6
]
3 ?
(X), [MnCl
6
]
3 ?
(Y) and [FeCl
6
]
3 ?
(Z) follows the order
(Given: Atomic numbers of Cr = 24, Mn = 25 and Fe = 26)
(A) X > Y > Z (B) X < Y < Z (C) Y < X < Z (D) X < Y = Z


Q.9 Among the following pairs, the paramagnetic and diamagnetic species, respectively, are
(A) CO and O
2
?

(B) NO and CO
(C) O
2
2 ?
and CO (D) NO
+
and O
2
?



Q.10 In compounds K
4
[Fe(CN)
6
] (P) and Fe(CO)
5
(Q), the iron metal centre is bonded to
(A) C of CN
?
in P and C of CO in Q
(B) N of CN
?
in P and C of CO in Q
(C) C of CN
?
in P and O of CO in Q
(D) N of CN
?
in P and O of CO in Q


Q.11 Among the following reactions, the one that produces achiral alcohol (after hydrolysis) is
(A)

H
3
C H
O
+ CH
3
CH
2
MgBr
(B)

H
3
C Ph
O
CH
3
CH
2
MgBr +
(C)

H
3
C OEt
O
+ CH
3
CH
2
MgBr
(D)

H
3
C
O
+ CH
3
CH
2
MgBr
CH
3

GATE 2015 CHEMISTRY (COMPULSORY) ? XL-H
XL-H 3/3
Q.12 The major product from the following reaction is

R
1) SO
3
, H
2
SO
4
R = tert-Butyl
3) H , H
2
O, heat
2) HNO
3
, H
2
SO
4
(A)

R
SO
3
H
NO
2

(B)

R
SO
3
H
NO
2
(C)

R
NO
2

(D)

R
NO
2



Q.13 The order of resonance energy for the following molecules is

O
N
H
S
(1) (2) (3) (4)
(A) (1) > (3) > (2) > (4) (B) (1) > (3) > (4) > (2)
(C) (1) > (4) > (2) > (3) (D) (1) > (4) > (3) > (2)


Q.14 The molar enthalpy of vaporization for a liquid (normal boiling point = 78.3
o
C) is 39 kJ mol
?1
. If
the liquid has to boil at 25
o
C, the pressure must be reduced to ________Torr (up to one decimal
place).
(Given: R = 8.314 JK
?1
mol
?1
; 1 atm = 760 Torr)



Q.15
For the process, H
2
O(l) ??H
2
O(s) at 0
o
C and 1 atm, the correct statement is
(A) ?S
system
= 0 (B) ?S
total
> 0 (C) ?S
total
= 0 (D) ?S
total
< 0



END OF THE QUESTION PAPER
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