Question

Select the incorrect statement.

A. In the decomposition of an oxide, into metal entropy increases
B. To make $$\Delta G$$  negative, $$T\Delta G > \Delta H$$
C. Ellingham diagram represents change in free energy with temperature
D. Reduction of an oxide with aluminium is called van Arkel process  
Answer :   Reduction of an oxide with aluminium is called van Arkel process
Solution :
Reduction of an oxide with aluminium is called aluminothermic process.

Releted MCQ Question on
Inorganic Chemistry >> Ores and Metallurgy

Releted Question 1

Copper can be extracted from

A. Kupfernical
B. Dolomite
C. Malachite
D. Galena
Releted Question 2

In the alumino-thermite process, aluminium acts as

A. an oxidizing agent
B. a flux
C. a reducing agent
D. a solder
Releted Question 3

The chemical composition of ‘slag’ formed during the smelting process in the extraction of copper is

A. $$C{u_2}O + FeS$$
B. $$FeSi{O_3}$$
C. $$CuFe{S_2}$$
D. $$C{u_2}S + FeO$$
Releted Question 4

Which of the following process is used in the extractive metallurgy of magnesium?

A. fused salt electrolysis
B. self reduction
C. aqueous solution electrolysis
D. thermite reduction

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Ores and Metallurgy


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