Byju's Answer
Standard XII
Chemistry
Nucleophilic Substitution Reaction
2. How to fin...
Question
2. How to find the oxidation number in the reaction 2Cu2O(s)+Cu2S(s) 6Cu(s) + SO2.
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Q.
Which of the following statements about the following reaction is/are wrong?
2
C
u
2
O
(
s
)
+
C
u
2
S
(
s
)
⟶
6
C
u
(
s
)
+
5
O
2
(
g
)
Q.
Assertion :In the reaction ,
2
C
u
2
O
(
s
)
+
C
u
2
S
(
s
)
→
6
C
u
(
s
)
+
S
O
2
(
g
)
copper acts as a reductant and sulphur acts as an oxidant Reason: The given reaction is not a redox reaction.
Q.
Some of the reactions taking place during bessemerisation possibly are -
A
:
F
e
O
+
S
i
O
2
→
F
e
S
i
O
3
B
:
2
F
e
S
+
3
O
2
→
2
F
e
O
+
2
S
O
2
C
:
2
C
u
2
S
+
3
O
2
→
2
C
u
2
O
+
2
S
O
2
D
:
2
C
u
2
O
+
C
u
2
S
→
6
C
u
+
S
O
2
Select reactions actually taking place :
Q.
Balanced equations for "the extraction of copper from copper pyrites by self-reduction." is :
C
u
2
S
+
2
C
u
2
O
→
6
C
u
+
S
o
2
.
If the given statement is true enter 1 else 0.
Q.
List
−
I
contains chemical reaction used in metallurgy and List
−
II
contains the name of process.
List - I
List - II
(I)
N
i
Impure
+
4
C
O
330
K
−
−−
→
N
i
(
C
O
)
4
450
K
−
−−
→
N
i
pure
+
4
C
O
(P) Leaching
(II)
4
A
u
+
4
N
a
C
N
+
O
2
+
2
H
2
O
−
−−−−
→
−
4
K
O
H
(Q) Mond's reduction
4
N
a
[
A
u
(
C
N
)
2
]
Soluble
Z
n
−
→
2
N
a
[
Z
n
(
C
N
)
4
]
+
4
A
u
(III)
T
i
C
l
4
+
2
M
g
→
T
i
+
2
M
g
C
l
2
(R) Auto reduction
(IV)
2
C
u
2
S
+
30
2
→
2
C
u
2
O
+
2
S
O
2
(S) Kroll process
C
u
2
S
+
2
C
u
2
O
→
6
C
u
+
S
O
2
Which of the following options has the correct combination considering List
-I
and List
-II
?
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