MolSynapse
question bank
All chapters
NEET
JEE
Practice
MolSynapse
/
Question bank
/
Metallurgy
/
Ellingham diagrams and thermodynamics of reduction
NEET level
Single correct option
Difficulty 1 of 3
mt198
The main reducing agent for iron oxides in the upper part of the blast furnace is
A
carbon monoxide
B
calcium oxide
C
calcium silicate
D
hydrogen
Answer: A
Coke burns to
CO
X
2
which is converted to CO by hot coke. CO rises and reduces iron oxides:
Fe
X
2
O
X
3
+
3
CO
2
Fe
+
3
CO
X
2
.
Practice Metallurgy
More on Ellingham diagrams and thermodynamics of reduction
Previous question
Next question
More questions on Ellingham diagrams and thermodynamics of reduction
Most metal oxide lines in the Ellingham diagram slope upward with temperature because
NEET level
Which of the following reactions is an example of calcination?
NEET level
Reduction of metal oxides such as Cr2O3 with powdered aluminium is known as
NEET level
In the Ellingham diagram, the line for C + O2 -> CO2 is almost horizontal because
JEE Main level
On an Ellingham diagram the line for 2C + O2 -> 2CO crosses the line of a metal oxide MO at a temperature T_0. For T > T_0
JEE Main level
The lines for 2C + O2 -> 2CO and 2CO + O2 -> 2CO2 intersect at about 983 K in the Ellingham diagram. Which statement is correct?
JEE Main level