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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?
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
The two metals which are extracted by means of electrolytic reduction of their molten salts are:
(a) magnesium and manganese
(b) iron and aluminium
(c) zinc and magnesium
(d) magnesium and aluminium
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
(a) Name the metal and write its chemical symbol.
(b) Write the name and formula of the sulphide ore.
(c) Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
(d) Name a common device in which this metal is used.
(e) Can this metal displace copper from copper sulphate solution? Why?
Compare the process of calcination and roasting.
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
Name a non- metal that has a metallic luster and sublimes on heating.
Iron is _______.
Extraction of moderately reactive elements is done by _______ and _______ method.
_______ is the least reactive metal.
Find the odd one out and give its explanation.
Write the name.
The molecular formula of main ore of aluminium –
Gold and silver are active metals.
Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Complete flow chart given below.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Identify the substance oxidised and reduced in the above reaction.
