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Class 12
Chemistry
Metallurgy
General Principles and Processes of Isolation of Elements
Which of the following is correct processes ?
(a)
F
e
+
A
l
2
O
3
⟶
2
A
l
+
F
e
2
O
3
(b)
Z
n
O
+
C
⟶
Z
n
+
C
O
(c)
C
r
2
O
3
+
2
A
l
⟶
2
C
r
+
A
l
2
O
3
(d)
2
[
A
g
(
C
N
)
2
]
−
+
Z
n
⟶
2
A
g
+
[
Z
n
(
C
N
)
4
]
2
−
Correct answer:
(b)
(c)
(d)
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Similar topics
general principles and processes of isolation of elements
metallurgical operations
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general principles and processes of isolation of elements
metallurgical operations
Related Questions
Ellingham diagram is used for:
A tetravalent element forms monoxide and dioxide with oxygen. When air is passed over heated element
(
1
2
7
3
K
)
, producer gas is obtained. Monoxide of the element is a powerful reducing agent and reduces ferric oxide to iron. Identify the element and write formulas of its monoxide and dioxide. Write chemical equation for the formation of producer gas and reduction of ferric oxide with the monoxide.
Oxides of the various metals are converted into metal by heating but not in :
The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.
Assertion :Reduction of
F
e
2
O
3
with CO is done below
7
1
0
0
C
.
Reason :
Δ
G
is negative at this temperature, thus process is spontaneous.
With respect to an ore, Ellingham diagram helps to predict the feasibility if its:
Draw an Ellingham diagram for metal oxides and explain what information can be obtaines from it.In addition explain why why most of the lines slope upwards from left 10 right,why the lines change in slope, and what happens when a line crosses the
Δ
G
=
0
axis
Explain the following:
C
O
2
is a better reducing agent below 710 K whereas
C
O
is a better reducing agent above 710 K.
Related Questions
Ellingham diagram is used for:
A tetravalent element forms monoxide and dioxide with oxygen. When air is passed over heated element
(
1
2
7
3
K
)
, producer gas is obtained. Monoxide of the element is a powerful reducing agent and reduces ferric oxide to iron. Identify the element and write formulas of its monoxide and dioxide. Write chemical equation for the formation of producer gas and reduction of ferric oxide with the monoxide.
Oxides of the various metals are converted into metal by heating but not in :
The choice of a reducing agent in a particular case depends on thermodynamic factor. How far do you agree with this statement? Support your opinion with two examples.
Assertion :Reduction of
F
e
2
O
3
with CO is done below
7
1
0
0
C
.
Reason :
Δ
G
is negative at this temperature, thus process is spontaneous.
With respect to an ore, Ellingham diagram helps to predict the feasibility if its:
Draw an Ellingham diagram for metal oxides and explain what information can be obtaines from it.In addition explain why why most of the lines slope upwards from left 10 right,why the lines change in slope, and what happens when a line crosses the
Δ
G
=
0
axis
Explain the following:
C
O
2
is a better reducing agent below 710 K whereas
C
O
is a better reducing agent above 710 K.
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