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प्रश्न
Write the name.
The process of extraction of aluminium from alumina-
उत्तर
The process of extraction of aluminium from alumina- Electrolytic reduction
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संबंधित प्रश्न
A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
Name the anode, the cathode and the electrolyte used in the electrolytic refining of impure copper.
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 mixture of materials fed into a furnace to extract a metal.
Compare the process of calcination and roasting.
Explain the following:
Galvanization protects iron from rusting.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
Explain in brief types of extraction of highly reactive metals according to their reactivity.
Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper, etc. are reduced by using:
