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Q. No.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
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:
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
| 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. |
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 |
From NCERT
NEET - 2023
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Match List-I with List-II
Choose the correct answer from the options given below:
| 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) \([Al_2(OH)_4Si_2O_5]\) |
| (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 |
74%
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 |
56%
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. \(\mathrm{CaCO}_3+2 \mathrm{HCl} \stackrel{\Delta}{\longrightarrow} \mathrm{CaCl}_2+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2\)
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 |
54%
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 |
52%
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 |
69%
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 |
59%
From NCERT
NEET - 2020
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Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
80%
From NCERT
NEET - 2019
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