>
AIIMS
>
Chemistry
List of top Chemistry Questions asked in AIIMS
Oxidation of glucose by
B
r
2
Br_2
B
r
2
-water gives saccharic acid.
B
r
2
Br_2
B
r
2
-water oxidises ??HO and ??H group.
AIIMS - 2018
AIIMS
Chemistry
Biomolecules
On passing electric current in colloidal solution they do not move towards anode or cathode. They do not contain any charge.
AIIMS - 2018
AIIMS
Chemistry
Surface Chemistry
Metal deficiency defect can be seen in
F
e
O
FeO
F
e
O
.
L
i
Li
L
i
compound (LiCl) has pink colour due to F-center.
AIIMS - 2018
AIIMS
Chemistry
The solid state
Due to Frenkel defect, there is no effect on the density of the crystalline solid. In Frenkel defect, no cation or anion leaves the crystal.
AIIMS - 2018
AIIMS
Chemistry
The solid state
A
l
Al
A
l
forms
[
A
l
F
6
]
3
−
[AlF_6]^{3-}
[
A
l
F
6
]
3
−
but B does not form
[
B
F
6
]
3
−
[BF_6]^{3-}
[
B
F
6
]
3
−
.
B
B
B
does not react with
F
2
F_2
F
2
.
AIIMS - 2018
AIIMS
Chemistry
p -Block Elements
The final product of the given reaction is
AIIMS - 2018
AIIMS
Chemistry
Aldehydes, Ketones and Carboxylic Acids
Which of the following order is correct?
AIIMS - 2018
AIIMS
Chemistry
Chemical bonding and molecular structure
Which of the following exhibits minimum number of oxidation states?
AIIMS - 2018
AIIMS
Chemistry
d -and f -Block Elements
Which of the following contains atleast one lone pair in all of its halides?
AIIMS - 2018
AIIMS
Chemistry
p -Block Elements
In which of the following elements number of d-electrons is zero in 6d-orbital?
AIIMS - 2018
AIIMS
Chemistry
d -and f -Block Elements
Major product of the given reaction is
AIIMS - 2018
AIIMS
Chemistry
Alcohols, Phenols and Ethers
Azeotropic mixtures are formed only by non-ideal solutions and they may have boiling points either greater than both the components or lesser than both the components. The composition of the vapour phase is same as that of the liquid phase of an azeotropic mixture.
AIIMS - 2017
AIIMS
Chemistry
Solutions
The depression in freezing point of
0.1
M
0.1\, M
0.1
M
aqueous solutions of
H
C
l
HCl
H
Cl
,
C
u
S
O
4
CuSO_4
C
u
S
O
4
and
K
2
S
O
4
K_2SO_4
K
2
S
O
4
are in the ratio
AIIMS - 2017
AIIMS
Chemistry
Solutions
Equivalent weight of NH in the reaction, N
?
?
?
NH is 17/3 while that of N is 28/6. Equivalent weight
=
M
o
l
e
c
u
l
a
r
w
e
i
g
h
t
N
u
m
b
e
r
o
f
e
−
l
o
s
t
o
r
g
a
i
n
e
d
p
e
r
m
o
l
e
\quad\quad \quad \quad \quad= \frac{Molecular\, weight}{Number\, of\, e^{-} lost or gained per mole}
=
N
u
mb
er
o
f
e
−
l
os
t
or
g
ain
e
d
p
er
m
o
l
e
M
o
l
ec
u
l
a
r
w
e
i
g
h
t
AIIMS - 2017
AIIMS
Chemistry
Some basic concepts of chemistry
Which of the following is an electrophile ?
AIIMS - 2017
AIIMS
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
Which of the following is an electrophile?
AIIMS - 2017
AIIMS
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
K
a
K_a
K
a
for
H
C
N
HCN
H
CN
is
5
×
1
0
−
10
5 \times 10^{-10}
5
×
1
0
−
10
at
2
5
∘
C
25^{\circ}C
2
5
∘
C
. For maintaining a constant
p
H
=
9
pH\, = \,9
p
H
=
9
, the volume of
5
M
K
C
N
5\, M \,KCN
5
M
K
CN
solution required to be added to
10
m
L
10 \,mL
10
m
L
of
2
M
H
C
N
2\, M HCN
2
M
H
CN
solution is
AIIMS - 2017
AIIMS
Chemistry
Equilibrium
The second dissociation constant of fumaric acid is greater than maleic acid. Higher the dissociation constant of acid, more is the acidic character.
AIIMS - 2017
AIIMS
Chemistry
Equilibrium
For the reaction,
H
2
+
I
2
⇌
2
H
I
,
K
=
47.6.
H_{2} + I_{2} {\rightleftharpoons} 2HI, K= 47.6.
H
2
+
I
2
⇌
2
H
I
,
K
=
47.6.
If the initial number of moles of each reactant and product is 1 mole then at equilibrium
AIIMS - 2017
AIIMS
Chemistry
Equilibrium
Which of the following oxoacids of phosphorus is a reducing agent and a monobasic acid as well?
AIIMS - 2017
AIIMS
Chemistry
p -Block Elements
Z
n
O
ZnO
Z
n
O
is white when cold and yellow when heated. It is due to the development of
AIIMS - 2017
AIIMS
Chemistry
The solid state
What is the name of the following reaction?
P
h
C
H
O
+
(
C
H
3
C
O
)
2
O
−
>
[
N
a
(
O
A
c
)
2
]
P
h
C
H
=
C
H
C
O
2
H
{PhCHO + (CH3CO)2O ->[Na(OAc)_2] PhCH=CHCO2H}
P
h
C
H
O
+
(
C
H
3
CO
)
2
O
−
>
[
N
a
(
O
A
c
)
2
]
P
h
C
H
=
C
H
CO
2
H
AIIMS - 2017
AIIMS
Chemistry
Aldehydes, Ketones and Carboxylic Acids
What is the correct order of basicity among the following compounds ?
AIIMS - 2017
AIIMS
Chemistry
Amines
(R)-2-Iodobutane is treated with
N
a
I
NaI
N
a
I
in acetone and allowed to stand for a long time. The product eventually formed is
AIIMS - 2017
AIIMS
Chemistry
introduction to organic chemistry
Ionisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in ground state is excited by monochromatic light of energy 12.1 eV. The spectral lines emitted by hydrogen according to Bohr?? theory will be
AIIMS - 2017
AIIMS
Chemistry
Structure of atom
Prev
1
2
3
4
5
6
...
35
Next