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प्रश्न
Atomic number of aluminium is _______ and its electronic configuration is _______.
पर्याय
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
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Name two metals which are found in nature mainly in the free state (as metallic elements).
Name the metal which is extracted from haematite ore.
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
Which metal can be extracted from the following ore?
bauxite
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
Give the chemical formula of :
Cryolite
Name the following:
The process of heating a substance very strongly in such a way that it does not combine with oxygen.
How an ore is concentrated by froth floatation process?
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Answer the following question :
What is the difference between calcination and roasting.
Heating an ore in a limited supply of air or in the absence of air at a temperature just below its melting point is known as ______.
Froth floatation process is generally used to concentrate ______ ores.
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why can the same process not be applied for them? Name the process used for the extraction of these metals.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
The poorest conductor of heat among metals is ____________.
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
An alloy is
