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Given below are two statements.
Statement I: The choice of reducing agents for metals extraction can be made by using Ellingham diagram, a plot of \( \Delta G \) vs temperature.
Statement II: The value of \( \Delta S \) increases from left to right in Ellingham diagram.
In the light of the above statements, choose the most appropriate answer from the options given below:

Match List-I with List-II :

List-I	List-II
(a) Haematite	(i) \( \mathrm{Al_2O_3 \cdot xH_2O} \)
(b) Bauxite	(ii) \( \mathrm{Fe_2O_3} \)
(c) Magnetite	(iii) \( \mathrm{CuCO_3 \cdot Cu(OH)_2} \)
(d) Malachite	(iv) \( \mathrm{Fe_3O_4} \)

Choose the correct answer from the options given below :

Given below are two statements:
Statement I : Sphalerite is a sulphide ore of zinc and copper glance is a sulphide ore of copper.
Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using ‘depressants’ in a froth flotation method.
Choose the most appropriate answer from the options given below:

In the leaching of alumina from bauxite, the ore expected to leach out in the process by reacting with \( \mathrm{NaOH} \) is:

Consider two chemical reactions \( (A) \) and \( (B) \) that take place during metallurgical process:
\( (A)\displaystyle \text{ZnCO}_{3\text{ (s)}} \xrightarrow{\Delta} \text{ZnO}_{\text{ (s)}} + \text{CO}_{2\text{ (g)}}\)
\( (B)\displaystyle 2\text{ZnS}_{\text{ (s)}} + 3\text{O}_{2\text{ (g)}} \xrightarrow{\Delta} 2\text{ZnO}_{\text{ (s)}} + 2\text{SO}_{2\text{ (g)}} \)
The correct option of names given to them respectively is:

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Aluminium is extracted from bauxite by the electrolysis of molten mixture of \( \mathrm{Al_2O_3} \) with cryolite.
Reason (R) : The oxidation state of Al in cryolite is \( +3 \).
In the light of the above statements, choose the most appropriate answer from the options given below:

Match List -I with List II

Choose the correct answer from the options given below:

The statement that is INCORRECT about Ellingham diagram is :

The metal that can be purified economically by fractional distillation method is:

10.

The addition of silica during the extraction of copper from its sulphide ore:

11.

Which refining process is generally used in the purification of low melting metals?

12.

Match List-I with List-II.

Choose the most appropriate answer from the options given below:

13.

Calamine and Malachite, respectively, are the ores of:

14.

The parameters of the unit cell of a substance are \( a = 2.5 \), \( b = 3.0 \), \( c = 4.0 \), \( \alpha = 90^\circ \), \( \beta = 120^\circ \), \( \gamma = 90^\circ \). The crystal system of the substance is :

15.

The point of intersection and sudden increase in the slope, in the diagram given below, respectively, indicates:

16.

Match List I with List II : (Both having metallurgical terms)

List - I	List - II
(a) Concentration of Ag ore	(i) Reverberatory furnace
(b) Blast furnace	(ii) Pig iron
(c) Blister copper	(iii) Leaching with dilute NaCN solution
(d) Froth floatation method	(iv) Sulfide ores

Choose the correct answer from the options given below:

17.

The chemical that is added to reduce the melting point of the reaction mixture during the extraction of aluminium is:

18.

In the electrolytic refining of blister copper, the total number of main impurities, from the following removed as anode mud is ________ . Pb, Sb, Se, Te, Ru, Ag, Au and Pt

19.

Which of the following reduction reaction CANNOT be carried out with coke?

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JEE Main 2021 24th Feb Evening Shift

Match List -I with List II

Choose the correct answer from the options given below:

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