With respect to an ore, Ellingham diagram helps to predict the feasibility of its
Thermal reduction
Electrolysis
Zone refining
Vapour phase refining
Assertion: For the extraction of iron, haematite ore is used.
Reason: Haematite is a carbonate ore of iron.
Both the assertion and reason are correct and the reason is the correct explanation for the assertion.
Only the assertion is correct.
Both the assertion and reason are correct, but the reason is not the correct explanation for the assertion
Only the reason is correct
The Mond process is used for the:
extraction of Zn
purification of Ni
purification of Zr and Ti
extraction of Mo
B.
purification of Ni
Nickel is purified by Mond’s process using the formation of unstable volatile compound.Ni(CO)4
The ore that contains the metal in the form of fluoride is
cryolite
malachite
magnetite
Sphalerite
Match the refining methods (column I) Watch metals (column-II)
Column I Refinging methods |
Column II Metal |
I) Liquation | a) Zr |
II) Zone refinging | b) Ni |
III) Mond proced | c) Sn |
IV) Van Arkel Method | d) Ga |
I-b, II- c, III-d, IV-a
I-c, II-d, III-b, IV-a
I-c, II-a, III-b, IV-d
I-b, II-d, III-a, IV-c
The correct statement is :
Zincite is a carbonate ore.
Zone refining process is used for the refining of titanium
Aniline is a for the stabilizer
Sodium cyanide cannot be used in the metallurgy of silver