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प्रश्न
Identify who I am!
Ore of Aluminum- ______
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उत्तर
Ore of Aluminum- Bauxite
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संबंधित प्रश्न
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
Name two metals which are found in nature mainly in the free state (as metallic elements).
What iron compound is present in haematite ore? Also write its chemical formula.
Rock salt is an ore of one of the following metals. This metal is:
Zinc blende ore can be converted into zinc oxide by the process of ______.
Metals X and Y can be recovered from the anode mud left behind after the electrolytic refining of copper metal. The coins made of metal X look new even after several years of use but the coins made of metal Y lose their shine gradually and get blackened soon. When metal X is alloyed with a small amount of metal Y, it becomes hard and hence suitable for making ornaments. What are metals X and Y? Also state the colour of metal X.
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?
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Define the term:
Flux
What is meant by concentration of ores?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Compare the properties of a typical metal and a non- metal on the basis of the following:
(a) electronic configuration
(b) nature of oxides
(c) oxidizing or reducing action
(d) conductivity of heat and electricity
Answer the following question :
What is the difference between calcination and roasting.
Define roasting.
Name the process used for the enrichment of sulphide ore.
Find the odd one out and give its explanation.
Explain concept with example/explain with the help of a balanced equation.
Roasting
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
