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Chemistry
List of top Chemistry Questions asked in KCET
In the conversion of
B
r
2
Br_2
B
r
2
to
B
r
O
3
−
BrO^-_3
B
r
O
3
−
, the oxidation number of
B
r
Br
B
r
changes from
KCET - 2006
KCET
Chemistry
Redox reactions
Δ
G
∘
V
s
T
\Delta G ^ \circ \,Vs\, T
Δ
G
∘
V
s
T
plot in the Ellingham's diagram slopes downwards for the reaction
KCET - 2006
KCET
Chemistry
General Principles and Processes of Isolation of Elements
Which of the following reaction taking place in the Blast furnace is endothermic ?
KCET - 2006
KCET
Chemistry
General Principles and Processes of Isolation of Elements
Which of the following can participate in linkage isomerism ?
KCET - 2006
KCET
Chemistry
coordination compounds
Which of the following is not an ore of magnesium?
KCET - 2006
KCET
Chemistry
General Principles and Processes of Isolation of Elements
When a quantity of electricity is passed through
C
u
S
O
4
CuSO_4
C
u
S
O
4
solution,
0.16
g
0.16\, g
0.16
g
of Copper gets deposited. If the same quantity of electricity is passed through acidulated water, then the volume of
H
2
H_2
H
2
liberated at
S
T
P
STP
STP
will be [Given
A
t
.
W
t
.
C
u
=
64
At. Wt. Cu = 64
A
t
.
W
t
.
C
u
=
64
]
KCET - 2006
KCET
Chemistry
Electrochemistry
Which of the following does not conduct electricity ?
KCET - 2006
KCET
Chemistry
Electrochemistry
Which of the following represents the Lewis structure of
N
2
N_2
N
2
molecule ?
KCET - 2006
KCET
Chemistry
Chemical bonding and molecular structure
The formation of
O
2
+
[
P
t
F
6
]
−
O^{+}_2 [P_t F_6 ]^-
O
2
+
[
P
t
F
6
]
−
is the basis for the formation of Xenon fluorides. This is because
KCET - 2006
KCET
Chemistry
p -Block Elements
Among the alkali metals cesium is the most reactive because
KCET - 2006
KCET
Chemistry
GROUP 1 ELEMENTS
An organic compound which produces a bluish green coloured flame on heating in presence of copper is
KCET - 2006
KCET
Chemistry
Haloalkanes and Haloarenes
The reaction
\(${C_2H_5ONa + C_2H_5I -> C_2H_5OC_2H_5 + NaI}$\)
is known
KCET - 2006
KCET
Chemistry
Ethers
The atomic numbers of
N
i
Ni
N
i
and
C
u
Cu
C
u
are
28
28
28
and
29
29
29
respectively. The electron configuration
I
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
10
Is^2 2s^2 2p^6 3s^2 3p^6 3d^{10}
I
s
2
2
s
2
2
p
6
3
s
2
3
p
6
3
d
10
represents
KCET - 2006
KCET
Chemistry
Structure of atom
4
4
4
moles each of
S
O
2
S O_{2}
S
O
2
and
O
2
O_{2}
O
2
gases are allowed to react to form
S
O
3
SO_{3}
S
O
3
in a closed vessel. At equilibrium
25
%
25 \%
25%
of
O
2
O_{2}
O
2
is used up. The total number of moles of all the gases present at equilibrium is
KCET - 2006
KCET
Chemistry
Equilibrium
The formula mass of Mohr's salt is
392
392
392
. The iron present in it is oxidised by
K
M
n
O
4
KMnO_4
K
M
n
O
4
in acid medium. The equivalent mass of Mohr's salt is
KCET - 2006
KCET
Chemistry
Redox reactions
The mass of glucose that should be dissolved in
50
g
50\, g
50
g
of water in order to produce the same lowering of vapour pressure as is produced by dissolving
1
g
1\, g
1
g
of urea in the same quantity of water is
KCET - 2006
KCET
Chemistry
Colligative Properties
The decomposition of a certain mass of
C
a
C
O
3
CaCO_3
C
a
C
O
3
gave
11.2
d
m
3
11.2\, dm^3
11.2
d
m
3
of
C
O
2
CO_2
C
O
2
gas at
S
T
P
STP
STP
. The mass of
K
O
H
KOH
K
O
H
required to completely neutralise the gas is
KCET - 2006
KCET
Chemistry
Stoichiometry and Stoichiometric Calculations
The brown ring test for nitrates depends on
KCET - 2006
KCET
Chemistry
Classical Idea Of Redox Reactions – Oxidation And Reduction Reactions
Glucose contains in addition to aldehyde group
KCET - 2006
KCET
Chemistry
Biomolecules
An example for autocatalysis is
KCET - 2006
KCET
Chemistry
Surface Chemistry
Liquor ammonia bottles are opened only after cooling. This is because
KCET - 2006
KCET
Chemistry
GROUP 1 ELEMENTS
A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide.If
Δ
H
\Delta H
Δ
H
is the enthalpy change and
Δ
E
\Delta E
Δ
E
is the change in internal energy, then,
KCET - 2005
KCET
Chemistry
Thermodynamics
The reaction in which phenol differs from alcohol is:
KCET - 2005
KCET
Chemistry
Chemical Reactions
For the reaction
N
2
(
s
)
+
O
2
(
s
)
⇌
2
N
O
(
g
)
N_{2(s)}+O_{2(s)} \rightleftharpoons 2 N O_{(g)}
N
2
(
s
)
+
O
2
(
s
)
⇌
2
N
O
(
g
)
, the value of
K
c
K_{c}
K
c
at
80
0
∘
C
800^{\circ} C
80
0
∘
C
is
0.1.
0.1 .
0.1.
When the equilibrium concentrations of both the reactants is
0.5
m
o
l
0.5 \,mol
0.5
m
o
l
, what is the value of
K
P
K_{P}
K
P
at the same temperature?
KCET - 2005
KCET
Chemistry
Equilibrium
A commercial sample of hydrogen peroxide is labelled as 10 volume. Its percentage strength is nearly
KCET - 2005
KCET
Chemistry
Hydrogen Bonding
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