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Recent questions in Chemistry
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JEEMAIN and NEET
>>
Chemistry
Chemistry
Some Basic concepts in Chemistry
Atomic Structure
Classification of Elements and Periodicity in Properties
Chemical Bonding and Molecular Structure
Chemical Thermodynamics
Equilibrium
Redox Reactions
Hydrogen
s-Block Elements
p-Block Elements
P-Block elements (Group-13 and Group-14)
Hydrocarbons
Some Basic principles of Organic chemistry
Environmental Chemistry
States of Matter: Liquids and Gases
States of Matter: Solid State
Solutions
Electrochemistry
Surface Chemistry
General Principals and Processes of Isolation of Metals
p-Block elements (Group-15 to Group-18)
d-and-f-Block Elements
Co-ordination Compounds
Halogens
Oxygen: Alchohols, Phenols and Ethers
Nitrogen
Polymers
Biomolecules
Chemistry in everyday life
Practical Chemistry
Chemical Kinetics
Purification and Characterisation of Organic Compounds
Oxygen: Aldehydes, Ketones and Carboxylic Acids
On heating ammonium dichromate the gas evolved is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Which one among the following pairs of ions cannot be separated by
H
2
S
in dilute hydrochloric acid?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
The phenomenon in which white transparent crystal changes into white powder is called
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Which of the following is not precipitated as sulphide by passing
H
2
S
in the presence of conc. HCl?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
A one litre flask is full of brown bromine fumes. The intensity of brown colour of vapour will not decrease appreciably on adding to the flask some
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
A mixture of two salts is not water soluble but dissolves completely in dil. HCl to form a colourless solution. The mixture could be
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Which of the following is soluble in yellow ammonium sulphide?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
An aqueous solution
F
e
S
O
4
.
A
l
2
(
S
O
4
)
3
and chrome alum is heated with excess of
N
a
2
O
2
and filtered. The materials obtained are
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Brown ring test is used to detect
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Turn bull's blue is the compound
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
A white crystalline substance dissolves in water. On passing
H
2
S
in this solution, a black ppt. is obtained. The black ppt. dissolves completely in hot
H
N
O
3
. On adding a few drops of conc.
H
2
S
O
4
, a white ppt. is obtained. The ppt. is that of
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Yellow ammonium sulphide solution is a suitable reagent for the separation of
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Which of the following sol will be destabilised with ionic impurities- if present?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
Which of the following sols cannot be prepared by boiling the dispersed phase with dispersion medium (water)?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
For dissolution of an ionic solid water
Δ
s
o
l
H
Θ
=
jeemain
chemistry
practical-chemistry
easy
asked
Jan 26, 2014
by
mosymeow_1
1
answer
H
2
S
will precipitate the sulphide of all the metals from the solution of chlorides of Cu, Zn and Cd if
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
by
mosymeow_1
1
answer
Sometimes yellow turbidity appears while passing
H
2
S
gas even in the absence of II group radicals. This is because
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
by
mosymeow_1
1
answer
A salt solution is treated with chloroform drops. Then it is shaken with chlorine water. Chloroform layer becomes violet, solution obtains
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
by
mosymeow_1
1
answer
The salt used for performing bead test in qualitative inorganic analysis is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
by
mosymeow_1
1
answer
In
K
M
n
O
4
titrations the indicator used is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 25, 2014
by
mosymeow_1
1
answer
The colour of the dye obtained by coupling benzene diazonium chloride with aniline is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Coupling of benzene diazonium chloride and aniline is carried out at pH
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Potash Alum is
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
2
answers
Phenol and acetic acid can be differentiated by
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Ethanol & Methanol can be differentiated by
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Alliphatic & aromatic aldehydes can be differentiated by
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Which of the following test is given both by aldehydes and ketones?
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Methyl Salicylate has a smell of
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
1
answer
Lassaigne's test for the detection of nitrogen fails in
jeemain
chemistry
practical-chemistry
easy
asked
Jan 24, 2014
by
mosymeow_1
3
answers
Reducing nature of
H
2
O
2
:
H
2
O
2
→
x
+
y
+
z
.
z
is
jeemain
chemistry
class11
hydrogen
unit9
q96
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
Reducing nature of
H
2
O
2
:
H
2
O
2
→
x
+
y
+
z
.The
x
and
y
are
jeemain
chemistry
class11
hydrogen
unit9
q95
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
2
K
3
F
e
(
C
N
)
6
+
2
K
O
H
→
x
+
y
+
z
,
H
2
O
2
+
z
→
y
+
w
.The
w
is
jeemain
chemistry
class11
hydrogen
unit9
q94
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
2
K
3
F
e
(
C
N
)
6
+
2
K
O
H
→
x
+
y
+
z
,
H
2
O
2
+
z
→
y
+
w
.The
z
is
jeemain
chemistry
class11
hydrogen
unit9
q93
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
2
K
3
F
e
(
C
N
)
6
+
2
K
O
H
→
x
+
y
+
z
,
H
2
O
2
+
z
→
y
+
w
.The
y
is
jeemain
chemistry
class11
hydrogen
unit9
q92
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
2
K
3
F
e
(
C
N
)
6
+
2
K
O
H
→
x
+
y
+
z
,
H
2
O
2
+
z
→
y
+
w
. The
x
is
jeemain
chemistry
class11
hydrogen
unit9
q91
difficult
mock
asked
Jan 24, 2014
by
sreemathi.v
1
answer
K
I
O
4
is reduced to
K
I
O
4
+
H
2
O
2
→
____________
jeemain
chemistry
class11
hydrogen
unit9
q90
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
The volume strength of ion
H
2
O
2
is
jeemain
chemistry
class11
hydrogen
unit9
q89
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
The wrong state in the below about
H
2
O
2
is
jeemain
chemistry
class11
hydrogen
unit9
q88
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
Which one of the following reactions does not form gaseous product?
jeemain
chemistry
class11
hydrogen
unit9
q87
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
In alkaline medium
H
2
O
2
reacts with
F
e
3
+
and
M
n
2
+
separately to give
jeemain
chemistry
class11
hydrogen
unit9
q86
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
Polyphosphates are used as water softening agents because they
jeemain
chemistry
class11
hydrogen
unit9
q85
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
4
L
i
H
+
A
l
C
l
3
dry ether
→
x
+
y
.
y
is
jeemain
chemistry
class11
hydrogen
unit9
q84
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
4
L
i
H
+
A
l
C
l
3
dry ether
→
x
+
y
.
x
is
jeemain
chemistry
class11
hydrogen
unit9
q83
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
2
N
a
+
H
2
h
e
a
t
→
2
N
a
H
,
C
a
+
H
2
→
C
a
H
2
,
2
L
i
+
H
2
→
x
.Then
x
is
jeemain
chemistry
class11
hydrogen
unit9
q82
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
C
u
+
H
2
h
e
a
t
→
C
u
+
x
,
Z
n
O
+
y
h
e
a
t
→
Z
n
+
H
2
O
,
2
A
g
C
l
+
H
2
→
z
+
w
.The
w
is
jeemain
chemistry
class11
hydrogen
unit9
q81
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
C
u
+
H
2
h
e
a
t
→
C
u
+
x
,
Z
n
O
+
y
h
e
a
t
→
Z
n
+
H
2
O
,
2
A
g
C
l
+
H
2
→
z
+
w
. The
z
is
jeemain
chemistry
class11
hydrogen
unit9
q80
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
C
u
+
H
2
h
e
a
t
→
C
u
+
x
,
Z
n
O
+
y
h
e
a
t
→
Z
n
+
H
2
O
,
2
A
g
C
l
+
H
2
→
z
+
w
.The
y
is
jeemain
chemistry
class11
hydrogen
unit9
q79
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
C
u
+
H
2
h
e
a
t
→
C
u
+
x
,
Z
n
O
+
y
h
e
a
t
→
Z
n
+
H
2
O
,
2
A
g
C
l
+
H
2
→
z
+
w
.The
x
is
jeemain
chemistry
class11
hydrogen
unit9
q78
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
Decomposition of
N
a
C
l
→
x
+
y
.They are
jeemain
chemistry
class11
hydrogen
unit9
q77
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
Hydrolith a source of hydrogen is
jeemain
chemistry
class11
hydrogen
unit9
q76
difficult
asked
Jan 24, 2014
by
sreemathi.v
1
answer
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