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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one is a malachite from the following?
1. CuCO3.Cu(OH)2
2. CuFeS2
3. Cu(OH)2
4. Fe3O4
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyConsidering Ellingham diagram, which of the following metals can be used to reduce alumina?
1. Fe
2. Zn
3. Mg
4. Cu
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyExtraction 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn the extraction of copper from its sulphide ore, the metal is finally obtained by the reduction of cuprous oxide with
1. Iron(II) sulphide
2. Carbon monoxide
3. Copper(I) sulphide
4. Sulphur dioxide
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRoasting of sulphides gives the gas X as a by-product. This is a colourless gas with choking smell of burnt sulphur and causes great damage to respiratory organs as a result of acid rain. Its aqueous solution is acidic, acts as a oxidizing agent and its acid has never been isolated. The gas X is:
1. SO2
2. CO2
3. SO3
4. H2S
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology