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Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
I
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a
c
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(
Z
n
2
+
/
Z
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)
=
-
0
.
76
V
,
(
C
u
2
+
/
C
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)
=
0
.
34
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:
Z
n
2
+
/
Z
n
C
u
2
+
/
C
u
Z
n
/
Z
n
2
+
C
u
/
C
u
2
+
Answer
1
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
Q.7. When
M
n
O
2
(b meq) oxidises HCl (20 meq),
M
n
O
2
is completely used. The excess HCl is titrated with 50 mL of 0.1 N NaOH solution leading to complete neutralisation. The value of b is
Choose one:
5
10
15
20
Answer
1
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
C
r
2
O
7
2
-
+
I
2
→
I
2
+
o
t
h
e
r
p
r
o
d
u
c
t
s
a
m
e
q
(
500
m
L
,
0
.
1
N
)
a
m
e
q
o
f
C
r
2
O
7
2
-
i
s
r
e
q
u
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r
e
d
f
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o
m
p
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t
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t
r
a
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o
n
w
i
t
h
I
-
(
a
q
)
s
o
l
u
t
i
o
n
a
=
c
h
o
o
s
e
o
n
e
a
.
50
×
3
b
.
50
×
2
6
c
.
50
×
6
2
d
.
50
Answer
2
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
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h
a
t
i
s
t
h
e
n
u
m
b
e
r
o
f
m
e
q
o
f
H
2
0
2
r
e
q
u
i
r
e
d
f
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c
o
m
p
l
e
t
e
t
i
t
r
a
t
i
o
n
w
i
t
h
300
m
L
s
o
l
u
t
i
o
n
o
f
0
.
1
N
?
C
h
o
o
s
e
o
n
e
:
30
m
e
q
(
30
x
5
/
2
)
m
e
q
(
30
×
2
/
5
)
m
e
q
60
m
e
q
Answer
1
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
Q.4. What is the molarity of 0.336 volume
H
2
O
2
solution?
Choose one:
0.004 M
0.005 M
0.01 M
0.03 M
Answer
1
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
N
o
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m
a
l
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f
t
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s
u
l
p
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a
t
e
s
o
l
u
t
i
o
n
(
S
2
0
3
2
-
(
a
q
)
)
i
s
S
2
0
3
2
-
+
I
2
→
S
4
0
6
2
-
+
I
-
0
.
03
M
C
h
o
o
s
e
o
n
e
:
0
.
09
N
0
.
015
N
0
.
03
N
0
.
06
N
Answer
2
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
​sir
Q.What is the equivalent weight (E) of K
2
Cr
2
O
7
in the acidic medium.
Cr
2
O
7
2
-
→
H
+
Cr
3
+
1
M
0
3
2
M
0
6
3
M
0
12
4
M
0
18
Answer
3
Shivam Gupta
Subject: Chemistry
, asked on 21/12/17
Q
1
.
W
h
a
t
i
s
t
h
e
e
q
u
i
v
a
l
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n
t
w
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g
h
t
o
f
K
M
n
O
4
i
n
t
h
e
a
c
i
d
i
c
m
e
d
i
u
m
?
M
n
O
4
-
→
H
+
M
n
2
+
M
o
:
m
o
l
e
c
u
l
a
r
w
e
i
g
h
t
A
M
o
4
B
M
o
1
C
M
o
3
D
M
o
5
Answer
1
Dhriti Gupta
Subject: Chemistry
, asked on 20/12/17
What is the significance of n factor
Answer
1
Misty Bajpai
Subject: Chemistry
, asked on 16/12/17
Calculate oxidation number - 1. of Ni in [Ni(CO)
4
]
2+
2. of Pt in K[PtCl
3
(NH
3
)]
Answer
2
Nidhi
Subject: Chemistry
, asked on 16/12/17
How to study reactions of chemistry??
Answer
1
Surita Singh
Subject: Chemistry
, asked on 4/12/17
what is the oxidation no. of KMnO4 negative have in neutral,basic and acidic medium and tell me how????
Answer
1
Aditya
Subject: Chemistry
, asked on 3/12/17
Using electron transfer concept identiofy the oxidant and reductant min both the cases plsspls in notebook eexplain nicely too
Solve b) and c) only
Answer
1
Aditya
Subject: Chemistry
, asked on 3/12/17
Commen t opn the toppic in 150 words
Oxidising action in acidic and baic medium
Answer
1
Arpita Dua
Subject: Chemistry
, asked on 2/12/17
Ans
Answer
1
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Q.What is the equivalent weight (E) of K2Cr2O7 in the acidic medium.
Solve b) and c) only
Oxidising action in acidic and baic medium