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प्रश्न
Name the following:
Main ore of aluminium.
Name the ore for aluminium.
Give one word for the following:
An ore of aluminium.
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उत्तर
Bauxite (Al2O3.nH2O) is the main ore of aluminium.
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संबंधित प्रश्न
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
In the extraction of aluminium: Write the function and formula of cryolite in the extraction of aluminium.
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
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 occur in nature in free state as well as in combined state.
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
Name two metals which are found in nature mainly in the free state (as metallic elements).
Name two metals which are always found in combined state.
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
Name three other metals which are extracted in a manner similar to sodium.
Manganese metal is extracted from manganese dioxide by a reduction process by making use of ______.
Which metal can be extracted from the following ore?
Haematite
State three objectives achieved during the roasting of ores.
Give the principles of electromagnetic separation.
Aluminum is used in thermite welding:
write reaction for process?
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?
Define the following term.
Mineral
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Name the following:
The mixture of materials fed into a furnace to extract a metal.
What is galvanized iron.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
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 ______.
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Name the following:
A steel grey coloured solid non-metal.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Gold and silver are active metals.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Explain the characteristics of ionic compounds.
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Explain concept with example/explain with the help of a balanced equation.
Roasting
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
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.
A mineral from which the metal can be extracted economically and conveniently is known as ______.
