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प्रश्न
Atomic number of aluminium is _______ and its electronic configuration is _______.
विकल्प
13, (2, 8, 3)
12, (2, 8, 2)
13, (3, 10)
12, (2, 10)
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उत्तर
Atomic number of aluminium is 13 and its electronic configuration is (2, 8, 3).
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संबंधित प्रश्न
What chemical process is used for obtaining a metal from its oxide?
Name one metal which is extracted by:
Electrolytic reduction.
Define the term gangue.
Rock salt is an ore of one of the following metals. This metal is:
An element A which is a part of common salt and kept under kerosene reacts with another element B of atomic number 17 to give a product C. When an aqueous solution of product C is electrolysed then a compound D is formed and two gases are liberated.
- What are A and B?
- Identify C and D.
- What will be the action of C on litmus solution? Why?
- State whether element B is a solid, liquid or gas at room temperature.
- Write formula of the compound formed when element B reacts with an element E having atomic number 5.
Which metal can be extracted from the following ore?
bauxite
Give the chemical formula of :
Cryolite
Define the term:
Flux
Which one of the following is not true of metal :
Metals are malleable and ductile
Froth floatation process is generally used to concentrate ______ ores.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
Write the name.
Metals which are amphoteric in nature.
Identify who I am!
Ore of Aluminum- ______
Explain the concept of Roasting.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Explain Bayer’s process of concentration of bauxite with a chemical equation.
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?
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
