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प्रश्न
Which form of the iron is the purest form of commercial iron?
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उत्तर
Wrought iron is the purest form of commercial iron.
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संबंधित प्रश्न
Write the names and chemical formulae of any one ore of zinc.
Mention names and formulae of two ores of alumunium.
What is the role of coke in the extraction of iron from its oxides?
Describe the roles of the following: SiO2 in the extraction of copper from copper matte
Name the method used for refining of copper metal.
In the extraction of zinc from zinc blende:
(i) Give an equation to show how zinc oxide is converted to zinc.
(ii) How is impure zinc finally electro-refined?
Which of the following options are correct?
(i) Cast iron is obtained by remelting pig iron with scrap iron and coke using hot air blast.
(ii) In extraction of silver, silver is extracted as cationic complex.
(iii) Nickel is purified by zone refining.
(iv) Zr and Ti are purified by van Arkel method.
In the thermite process, the reducing agent is:
Metal always found in Free State is
Match List I with List II.
| List - I | List - II | ||
| a. | Siderite | I. | FeCO3 |
| b. | Malachite | II. | CuCO3 · Cu(OH)2 |
| c. | Sphalerite | III. | ZnS |
| d. | Calamine | IV. | ZnCO3 |
Choose the correct answer from the option given below.
