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Which element is purified by Zone refining?
(b) Ge and Si both the elements are purified by Zone refining.
Alloy is an example of:
(C) Dispersion of solid in solid is called solid sol.
Which method of purificationis represented by the following equation?
Ti(s) + 2I2(g) TiI4(g) Ti(s) + 2I2(g)
(c) This is Van-Arkel method for purification of Ti.
The second most common element on the earth is:
Coating of zinc on iron objects is commonly known as:
(C) It is a fact.
Nickel is purified by thermal decomposition of its:
(d) Ni(CO)4 Ni + 4CO
In Serpek's process , by product obtained in the purification of bauxite is:
(c) SiO2 + 2C Si + 2CO
Al2O3 + 3C + N2 2AlN + 3CO
AlN + 3H2O Al(OH)3 + NH3
CO is used in the metallurgy of:
(b) For purification of Ni in Mond's process.
In the cyanide extraction process of silver from argentite ore, the oxidizing and reducing agents used for:
(b) The reaction involved in cyanide extraction process are:
Ag2S +4NaCN 2Na[Ag(CN)2]+Na2S
4Na2S + 5[O2] + 2H2O 2Na2SO4 + 4NaOH + 2S
2Na[Ag(CN)2]+ZN Na2[Zn(CN)4]+2Ag
Name the metal M which is extracted on the basis of following reactions,
4M+8CN-+2H2O+O24[M(CN)2]-+4OH-
2[M(CN)2]-+Zn[Zn(CN)4]2-+2M
(b) Both Ag and Au are extracted by complex formation method
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