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प्रश्न
Write the name.
Metals which are amphoteric in nature.
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उत्तर
Metals which are amphoteric in nature- Aluminium (Al), zinc (Zn)
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संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
Metallic oxides of zinc, magnesium and copper were heated with the following metals.
| Metal | Zinc | Magnesium | Copper |
| Zinc oxide | – | – | – |
| Magnesium oxide | – | – | – |
| Copper oxide | – | – | – |
In which cases will you find displacement reactions taking place?
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
A zinc ore gave CO2 on treatment with a dilute acid. Identify the ore and write its chemical formula.
Name one metal which is extracted by:
Electrolytic reduction.
Give the name and chemical formula of one ore of copper.
Name two metals which occur in nature in free state as well as in combined state.
What is meant by the ‘concentration of ore’?
Name one ore of copper (other than cuprite). Which compound of copper is present in this ore? Also, write its chemical formula.
What is the difference between a mineral and an ore?
The metal which can be extracted from pyrolusite ore is ______.
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 substance added to get rid of gangue in the extraction of metal.
Name the following:
The process in which an ore is heated in air so that oxygen gets added to it to form the oxides.
Compare the process of calcination and roasting.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Explain the concept of Roasting.
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
