Match the column (I) and (II) and select the correct answer using the codes given below.

      Column-I                                                           Column-II

(a) Argentite                                                       (1) Halide ore 

(b) Cuprite                                                          (2) Carbonate ore 

(c) Siderite                                                          (3) Oxide ore 

(d) Carnallite                                                       (4) Sulphide ore 

Codes :

          a       b         c         d                                             a         b        c          d

(A)     4       3         2         1                                   (B)     1         2         3         4   

(C)     2       3         4         1                                   (D)     3         4         1         2

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 75%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The correct statement among the following is: 

1. In the decomposition of oxide into oxygen and gaseous metal, entropy increases.
2. Decomposition of oxide is an endothermic change.
3. To make ∆G° negative, the temperature should be high enough so that T∆S° > ∆H°.
4. All of the above.

Subtopic:  Ellingham Diagram |
 86%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which does not represent the correct method?

(A) TiCl2+2MgTi+2MgCl2             : Kroll

(B) NiCO4Ni+4CO                      : Mond

(C) Ag2CO32Agc+CO2+12O2         : Van Arkel

(D) ZrI4Zr+2I2                                : Van Arkel

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 81%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Main source of lead is galena (PbS). It is converted to Pb by:

(A) PbS airPbO+SO2                C Pb+CO2

(B) PbS airPbO+Pbs                 Pb+SO2

(A) A                                                                   (B) B

(C) both                                                              (D) none

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

For which of the following metals Bessemerisation process is important?

I : Fe, II : Cu, III : Al, IV : Silver :

(1) I, II                                     

(2) II, III

(3) I, III                                     

(4) all

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 53%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The chemical processes in the production of steel from haematite ore involve:

(1) Reduction                                       
(2) Oxidation
(3) Reduction followed by oxidation         
(4) Oxidation followed by reduction

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 55%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The chemical composition of "slag" formed during the smelting process in the extraction of copper is:

1. Cu+ FeS                                    

2. FeSiO3

3. CuFeS                                         

4. Cu2S + FeO

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 80%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statement is incorrect about the extractive metallurgy of copper?

(1) Matte chiefly consists of cuprous sulfide and some ferrous sulphide.

(2) Most of the impurity of iron sulphide is removed as fusible slag during roasting.

(3) The copper pyrites is concentrated by froth floatation process.

(4) self reduction and electrolysis respectively. 

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Pb and Sn are extracted from their chief ore by:

1. carbon reduction and self-reduction respectively.

2. self-reduction and carbon reduction respectively.

3. electrolysis and self-reduction respectively.

4. self-reduction and self-reduction respectively.

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 62%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which of the following statements is incorrect?

(1) Cassiterite ore of tin contains the impurities of Wol-framite which are separated by electromagnetic separator.

(2) Tin metal is obtained by the carbon reduction of black tin.

(3) In the extraction of lead from galena, the roasting and self-reduction are carried in the same furnace at different temperatures.

(4) Reducing agent of haematite in blast-furnace is coke in upper part and CO in lower part of furnace.

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 55%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh