Advertisements
Advertisements
प्रश्न
Name the following:
Main ore of aluminium.
Name the ore for aluminium.
Give one word for the following:
An ore of aluminium.
Advertisements
उत्तर
Bauxite (Al2O3.nH2O) is the main ore of aluminium.
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
Name two metals which are found in nature in the free state.
In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte?
Give a reasons for the following:
Carbonate and sulphide ores are usually converted into oxides during the process of extraction of metals.
Write the composition of the alloy called bronze.
Name two metals which are highly resistant to corrosion.
The rocky material found with ores is called ______.
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.
What is the difference between a mineral and an ore?
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Name three other metals which are extracted in a manner similar to sodium.
How is aluminium metal extracted? Explain with the help of an equation.
Describe the extraction of zinc metal from its sulphide ore (zinc blende). Write equations of the reactions involved.
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
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.
An important ore of zinc metal is ______.
The metal which can be extracted from pyrolusite ore is ______.
State three objectives achieved during the roasting of ores.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Give reasons, why aluminum is used in:
In aluminiothermy
Aluminum is used in thermite welding:
what is thermit?
How an ore is concentrated by froth floatation process?
What is passive iron?
Write equations for each of the above metal which reacts with water.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
Name the methods by which concentrated ore is converted to metallic oxide.
State three objectives achieved during the roasting of ores.
Name the process used for the enrichment of sulphide ore.
Right or wrong sentence?
In the electrolytic dissipation method of alumina, the lining of graphite acts as an anode.
Write the molecular formulae of the following compound.
Cryolite
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 in brief types of extraction of less reactive metals according to their reactivity.
Explain Bayer’s process of concentration of bauxite with a chemical equation.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
In extraction of copper, the flux used is ____________.
Which of the following ore is concentrated by the Froth floatation process?
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
