In the purification of impure nickel by Mond's process, metal is purified by:

(1) Electrolytic reduction

(2) Vapour phase thermal decomposition

(3) Thermite reduction

(4) Carbon reduction

 

Subtopic:  Refining Process |
 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

The reduction of an oxide by aluminium is called:

(1) Bayer's process

(2) Goldschmidt's aluminothermite process

(3) Hall's process

(4) van Arkel process

Subtopic:  Metallurgy of individual elements |
 66%
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) calamine and siderite are carbonates           

(2) argentite and cuprite are oxides

(3) zinc blende and pyrites are sulphides         

(4) malachite and azurite are ores of copper

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 60%
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

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