The reaction that does not take place in a blast furnace between 900 K to 1500 K temperature range during the extraction of iron is: 

1. CaO + SiO2 → CaSiO3 
2. Fe2O3 + CO → 2FeO + CO2 
3. FeO + CO → Fe +CO2 
4. C + CO2 → 2CO
Subtopic:  Metallurgy of individual elements |
From NCERT
NEET - 2023
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Read the following statement and choose the set of correct statements:
A. Chrome steel is used for cutting tools and crushing machines.
B. The fine dust of aluminium is used in paints and lacquers.
C. Copper is used for the reduction of alcohol.
D. Zinc dust is used as a reducing agent in the manufacturing of paints.
E. Iron is used for galvanising zinc. 
choose the most appropriate answer from the options given below:
1. (D) and (E) only
2. (A) and (D) only
3. (A), (B), and (D) only
4. (B), (C), and (D) only
Subtopic:  Metallurgy of individual elements |
 51%
From NCERT
NEET - 2023
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Match List-I with List-II
List- I (ores)  List- II (Composition)
(a) Haematite (i) \(Fe_3O_4\)
(b) Magnetite  (ii) \(ZnCO_3\)
(c) Calamine  (iii) \(Fe_2O_3\)
(d) Kaolinite (iv) \([Al_2(OH)_4Si_2O_5]\)
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (i) (iii) (ii) (iv)
2. (i) (ii) (iii) (iv)
3. (iii) (i) (ii) (iv)
4. (iii) (i) (iv) (ii)
Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 75%
From NCERT
NEET - 2022
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Given below are two statements:

I: The Ellingham diagram provides an idea about the feasibility of a reaction.
II: The Ellingham diagram explains the rate of the reduction reactions.

In light of the above statements, choose the most appropriate answer from the options given below: 

1. I is correct and II is incorrect.
2. I is incorrect and II is correct.
3. Both I and II are correct.
4. Both I and II are incorrect.
Subtopic:  Ellingham Diagram |
 57%
From NCERT
NEET - 2022
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Which one of the following is not a calcination reaction?
1.  \(\mathrm{ZnCO}_3 \xrightarrow[]{\Delta} \mathrm{ZnO}+\mathrm{CO}_2\)
2.  \(\mathrm{Fe}_2 \mathrm{O}_3 \cdot \mathrm{xH}_2 \mathrm{O} \stackrel{\Delta}{\longrightarrow} \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{xH}_2 \mathrm{O}\)
3.  \(\mathrm{CaCO}_3 \cdot \mathrm{MgCO}_3 \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{MgO}+2 \mathrm{CO}_2\)
4.  \(\mathrm{CaCO}_3+2 \mathrm{HCl} \stackrel{\Delta}{\longrightarrow} \mathrm{CaCl}_2+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2\)
Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 56%
From NCERT
NEET - 2022
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Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?
1. Distillation
2. Zone refining
3. Electrolysis
4. Chromatography

Subtopic:  Refining Process |
 53%
From NCERT
NEET - 2021
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The maximum temperature that can be achieved in blast furnace is :

1. Upto 1900 K

2. Upto 5000 K

3. Upto 1200 K

4. Upto 2200 K

Subtopic:  Metallurgy of individual elements |
 70%
From NCERT
NEET - 2021
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The correct statement among the following is:

1. Blister copper has a blistered appearance due to the evolution of CO2.
2. Vapour phase refining is carried out for nickel by the Van Arkel method.
3. Pig iron can be moulded into a variety of shapes.
4. Wrought iron is impure iron with 4 % carbon.

Subtopic:  Refining Process |
 60%
From NCERT
NEET - 2020
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Match the elements in Column I with methods of purification in Column II.

Column I Column II
(a) Boron (i) Van Arkel method
(b) Tin (ii) Mond's process
(c) Zirconium    (iii) Liquation
(d) Nickel    (iv) Zone refining
 
Options: (a) (b) (c) (d)
1. (iv) (iii) (i) (ii)
2. (iv) (iii) (ii) (i)
3. (ii) (i) (iv) (iii)
4. (iii) (iv) (i) (ii)

Subtopic:  Refining Process |
 60%
From NCERT
NEET - 2020
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Which one is a malachite from the following?

1. CuCO3.Cu(OH)2

2. CuFeS2

3. Cu(OH)2

4. Fe3O4

Subtopic:  Intro - Flux, Leaching, Roasting & Calcination |
 80%
From NCERT
NEET - 2019
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