Advertisements
Advertisements
Question
Write features of Ellingham's diagrams
Solution
Features of Ellingham diagram:
(a) The graph for the formation of a metal oxide is a straight line with an upward slope.
(b) There is a sudden change in the slopes for some metal oxides, such as MgO, ZnO and HgO.
(c) For a few metal oxides of silver and mercury (Ag2O and HgO), the graph is at the upper part in the Ellingham diagram.
APPEARS IN
RELATED QUESTIONS
What are Ellingham's diagrams? Write 2 features of it.
Why is zinc not extracted from zinc oxide through reduction using CO?
The value of `triangle_tG^theta` for formation of Cr2O3 is − 540 kJmol−1 and that of Al2 O3 is − 827 kJmol−1. Is the reduction of Cr2O3 possible with Al?
Predict conditions under which Al might be expected to reduce MgO.
Silica is a/an _______.
Given below are two statements.
Statements I: The choice of reducing agents for metal extraction can be made by using Ellingham diagram, a plot of ΔG vs temperature.
Statements II: The value of ΔS increases from left to right in Ellingham diagram. In the light of above statements, choose the most appropriate from the options given below:
With respect to an ore, Ellingham diagram helps to predict the feasibility of its.
In blast furnace, the hearth is lined with ______.
The o, p-directing but deactivating group is ______.
Assertion A: Magnesium can reduce Al2O3 at a temperature below 1350°C, while above 1350°C aluminium can reduce MgO.
Reason R: The melting and boiling points of magnesium are lower than those of aluminium.
In light of the above statements. choose most appropriate answer from the options given below:
An Ellingham diagram provides information about ______.
