Extraction of specific metals

The correct statement(s) related to processes involved in the extraction of metals is(are)

The electrochemical extraction of aluminum from bauxite ore involves

The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range 900 - 1500 K is(are)

Which of the following chemical reactions represents Hall-Heroult Process?

Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with zinc forms the elemental gold and another complex [B]. [A] and [B], respectively are :

Match List - I with List - II.

Choose the correct answer from the options given below.

Statement I: Leaching of gold with cyanide ion in absence of air / $\mathrm{O_2}$ leads to cyano complex of Au(III).

Statement II: Zinc is oxidized during the displacement reaction carried out for gold extraction.

In the light of the above statements, choose the correct answer from the options given below.

In the metallurgical extraction of copper, following reaction is used :

$$\mathrm{FeO+SiO_2\rightarrow FeSiO_3}$$

FeO and $\mathrm{FeSiO_3}$ respectively are.

In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved ?

Blister copper is produced by reaction of copper oxide with copper sulphide.

$$\mathrm{2Cu_2O+Cu_2S\rightarrow6Cu+SO_2}$$

When $2.86\times10^3$ g of $\mathrm{Cu_2O}$ and $4.77\times10^3$ g of $\mathrm{Cu_2S}$ are used for reaction, the mass of copper produced is ______ g. (nearest integer)

(Atomic mass of Cu = 63.5 a.m.u, S = 32.0 a.m.u, O = 16.0 a.m.u)

The compound(s) that is(are) removed as slag during the extraction of copper is :

(A) CaO

(B) FeO

(C) $\mathrm{Al_2O_3}$

(D) ZnO

(E) NiO

Choose the correct answer from the options given below :

Given below are two statements.

Statement I: Pig iron is obtained by heating cast iron with scrap iron.

Statement II: Pig iron has a relatively lower carbon content than that of cast iron.

In the light of the above statements, choose the correct answer from the options given below.

The metal that is not extracted from its sulfide ore is

Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores if iron is ______.

Match List I with List II

Choose the correct answer from the options given below :

The correct statement(s) related to the metal extraction processes is(are)

Al$_2$O$_3$ was leached with alkali to get X. The solution of X on passing of gas Y, forms Z. X, Y and Z respectively are :

Which among the following statement(s) is(are) true for the extraction of aluminium from bauxite?

The cyanide process of gold extraction involves leaching out gold from its ore with $\ce{CN-}$ in the presence of Q in water to form R. Subsequently, R is treated with T to obtain Au and Z. Choose the correct option(s)

Galena (an ore) is partially oxidized by passing air through it at high temperature. After some time, the passage of air is stopped, but the heating is continued in a closed furnace such that the contents undergo self-reduction. The weight (in kg) of Pb produced per kg of $\mathrm{O_2}$ consumed is ____.

(Atomic weights in g mol$^{-1}$: O = 16, S = 32, Pb = 207)