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Question
Sulphide ores : Roasting : : Carbonate ores : _______
Solution
Sulphide ores : Roasting : : Carbonate ores : Calcination
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RELATED QUESTIONS
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
What iron compound is present in haematite ore? Also write its chemical formula.
Name one ore of aluminium. Name the aluminium compound present in this ore and write its chemical formula.
Name the metal which is extracted from the ore called 'rock salt'.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
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An element has its electron configuration as 2,8,8,2. Now answer the following questions.
a) What is the atomic number of this element?
b) What is the group of this element?
c) To which period does this element belong?
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Define roasting.
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Write the name.
The process of extraction of aluminium from alumina-
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Write the molecular formulae of the following compound.
Fluorspar
Explain the concept of Roasting.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Answer the questions on the following passage.
The minerals from which the metal can be separated economically are called ores. Ores contain many types of impurities such as soil, sand and rocky substances along with metal compounds. These impurities are called gangue.
Metals can be extracted from their ores by means of various methods of separation. The process of extraction of metal in a pure state from the ores is also a part of metallurgy.
Ores are taken out from the mines and the gangue is usually separated from the ore at the site itself by various methods. Then the ores are carried out to the place where metals are produced. Here metals are extracted in pure form. Then metals are further purified by different methods of purification. This entire process is called metallurgy. Most metals being reactive do not occur in nature in the free state but are found in combined state as their salts such as oxides, carbonates, sulphides, and nitrates. however, the most unreactive metals that are not affected by air, water and other natural factors like silver, gold, platinum, generally occur in a free state. The compounds of metals that occur in nature along with the impurities are called minerals.
- What are ores?
- Which processes are involved in the branch of metallurgy? What is metallurgy?
- Which metals are found in a free state?
- In what forms are metals found in combined state?
- What is gangue?
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
