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Chinmayi
Subject: Chemistry
, asked on 31/1/18
Why build up of positive charge in oxidation half cell (without salt bridge) of Daniell cell prevent flow of electrons?
Answer
1
Deepak Vyas
Subject: Chemistry
, asked on 21/1/18
Answer pls
16. Three electrolytic cells A, B and C containing electrolytes ZnSO
4
, AgNO
3
and CuSO
4
respectively were connected in series. A steady current of 1.50 ampere was passed through them until 1.45 g of Ag were deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited? (At. wts. of Cu=63.5, Zn=65.3, Ag=108)
Answer
1
Shivam Sharma
Subject: Chemistry
, asked on 21/1/18
Solve this:
Q15. Calculate the emf of the following cell at 25° C.
Ag (s) Ag
+
(10
–3
M) || Cu
2+
(10
–1
M) | Cu (s)
[Given ,
∆
E
°
cell
= + 0.46 V and log 10
n
=
Answer
1
Mohnish Bhangle
Subject: Chemistry
, asked on 16/1/18
describe the following types of electrodes giving one example, with reference to formulated electrode reaction and nerst equation for electrode potential a)metal sparingly salt electrode b)gas electrode
Answer
1
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 12/1/18
No links please
Choose the correct answer from each of the following question.
Q.12. By which substance is natural rubber vulcanized?
a) ZnO
b) MgO
c) S
d) Si
Answer
2
Shubhrajyoti Ghosh
Subject: Chemistry
, asked on 12/1/18
No links please
choose the correct answer from each of the following question
11. Which of the following nitrogeneous base is present in DNA and not in RNA
a) Cytosine b) Guanine c) Thymine d) Adenine
Answer
2
Rupal Sahu
Subject: Chemistry
, asked on 10/1/18
Solve this:
15
.
C
a
l
c
u
l
a
t
e
t
h
e
s
tan
d
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r
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c
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p
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t
i
a
l
o
f
t
h
e
G
a
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v
a
n
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c
c
e
l
l
i
n
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i
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t
h
e
f
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t
a
k
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s
p
l
a
c
e
.
F
e
2
+
a
q
+
A
g
+
a
q
→
F
e
3
+
a
q
+
A
g
(
s
)
C
a
l
c
u
l
a
t
e
t
h
e
∆
r
G
0
a
n
d
e
q
u
i
l
i
b
r
i
u
m
c
o
n
s
tan
t
o
f
t
h
e
r
e
a
c
t
i
o
n
a
l
s
o
.
(
E
O
A
g
+
7
/
A
g
=
0
.
08
V
E
0
F
e
3
+
/
F
e
2
+
=
0
.
77
V
)
Answer
1
Nithyashrri Saravanan
Subject: Chemistry
, asked on 5/1/18
The 24th one
Answer
1
Aashish Rohilla
Subject: Chemistry
, asked on 3/1/18
b) Find the emf of the following electrochemical cell at 298K.
P
t
/
S
n
4
+
(
0
.
02
M
)
,
S
n
2
+
(
0
.
04
M
)
∥
F
e
3
+
(
0
.
08
M
)
,
F
e
2
+
(
0
.
04
M
)
/
P
t
E
°
S
n
4
+
/
S
n
2
+
=
+
0
.
15
V
E
°
F
e
3
+
/
F
e
2
+
=
+
0
.
77
V
Answer
1
Muskan Ahluwalia
Subject: Chemistry
, asked on 3/1/18
Send link to open redo reaction chapter and aits as it is not in online tution
Answer
1
Aashish Rohilla
Subject: Chemistry
, asked on 3/1/18
the value of delta G for formation of cr203 is -540Kj per mole and that of a Al2O3 is -827 kilo joule per mole is a reduction of Cr2o3 possible with aluminium?
Answer
1
Muskan Ahluwalia
Subject: Chemistry
, asked on 31/12/17
plz send link to open redox reaction andaits as it is not given in the online tutions
Answer
1
Vidipta Fulpadia
Subject: Chemistry
, asked on 30/12/17
during recharging of lead storage battery, why is some battery water added
Answer
2
Muskan Ahluwalia
Subject: Chemistry
, asked on 30/12/17
send link to open redox reaction and aits
Answer
2
Muskan Ahluwalia
Subject: Chemistry
, asked on 26/12/17
i have not found any link for redox reaction and all india test series
Answer
1
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16. Three electrolytic cells A, B and C containing electrolytes ZnSO4, AgNO3 and CuSO4 respectively were connected in series. A steady current of 1.50 ampere was passed through them until 1.45 g of Ag were deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited? (At. wts. of Cu=63.5, Zn=65.3, Ag=108)
Q15. Calculate the emf of the following cell at 25° C.
Ag (s) Ag+ (10–3 M) || Cu2+ (10–1M) | Cu (s)
[Given , cell = + 0.46 V and log 10n =
Choose the correct answer from each of the following question.
Q.12. By which substance is natural rubber vulcanized?
a) ZnO
b) MgO
c) S
d) Si
choose the correct answer from each of the following question
11. Which of the following nitrogeneous base is present in DNA and not in RNA
a) Cytosine b) Guanine c) Thymine d) Adenine