Q. No.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 |
75%
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 |
55%
From NCERT
NEET - 2022
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NEET 2023 - Target Batch - Aryan Raj Singh
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
80%
From NCERT
NEET - 2019
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Identify the incorrect statement:
| 1. | The scientific and technological process used for isolation of the metal from its ore is known as metallurgy |
| 2. | Minerals are naturally occurring chemical substances in the earth's crust |
| 3. | Ores are minerals that may contain a metal |
| 4. | Gangue is an ore contaminated with undesired materials |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
From NCERT
NEET - 2019
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Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:
1. Distillation
2. Zone refining
3. Displacement with Zn
4. Liquation
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
77%
From NCERT
NEET - 2017
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Match items of Column I with the items of Column II and assign the correct code.
| Column I | Column II |
| A) Cyanide process | 1) Ultra pure Ge |
| B) Froth floatation Process |
2) Dressing of ZnS |
| C) Electrolytic | 3) Extraction of Al Reduction |
| D) Zone refining | 4) Extracting of Au |
| A | B | C | D | |
| 1. | 2 | 3 | 1 | 4 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 3 | 4 | 2 | 1 |
| 4. | 4 | 2 | 3 | 1 |
Subtopic: Intro - Flux, Leaching, Roasting & Calcination | Refining Process |
82%
From NCERT
NEET - 2016
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Roasting of sulphides gives the gas X as a by-product. This is a colourless gas with a choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic and acts as an oxidizing agent and its acid has never been isolated. The gas X is:
1. SO2
2. CO2
3. SO3
4. H2S
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
84%
From NCERT
AIPMT - 2013
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NEET 2023 - Target Batch - Aryan Raj Singh
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Subtopic: Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
78%
From NCERT
AIPMT - 2012
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NEET 2023 - Target Batch - Aryan Raj Singh
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Links
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NEET 2023 - Target Batch - Aryan Raj Singh
Which one of the following is a mineral of iron?
1. Malachite
2. Cassiterite
3. Pyrolusite
4. Magnetite
Subtopic: Intro - Flux, Leaching, Roasting & Calcination |
85%
From NCERT
AIPMT - 2012
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
Which of the following elements is present as an impurity to the maximum extent in the pig Iron?
1. Carbon
2. Silicon
3. Phosphorus
4. Manganese
Subtopic: Intro - Flux, Leaching, Roasting & Calcination | Metallurgy of individual elements |
81%
From NCERT
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints
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NEET 2023 - Target Batch - Aryan Raj Singh
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