Question

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.

1. What are metals?
2. Which processes are involved in the branch of metallurgy? What is metallurgy?
3. Which metals are found in free state?
4. In what form are metals found in composite?
5. What is soil impurity?

Answer 1

1. The passage does not provide a direct definition of metals. However, based on the text, metals are substances that are extracted from ores, can be highly reactive (found as salts) or unreactive (found in a free state), and are purified through the process of metallurgy.
2. GF
   1. Processes involved: The processes involve extracting ores from mines, separating gangue from the ore, extracting the metals in pure form, and further purifying the metals using different methods.
   2. Definition: The entire process of separating gangue, extracting metal in its pure state from ores, and further purifying it is called metallurgy.
3. Unreactive metals that are not affected by air, water, and other natural factors, such as silver, gold, and platinum, are generally found in a free state.
4. Reactive metals are found in a combined state as their salts, such as oxides, carbonates, sulphides, and nitrates.
5. Impurities such as soil, sand, and rocky substances that are present in ores along with the metal compounds are called gangue.