Advertisements
Advertisements
प्रश्न
Write the name.
The molecular formula of main ore of aluminium –
Advertisements
उत्तर
The molecular formula of main ore of aluminium – Al2O3•nH2O
APPEARS IN
संबंधित प्रश्न
The non-metal present in steel is ______.
Name the metal which is extracted from haematite ore.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
Distinguish between ‘roasting’ and ‘calcination’. Which of these two is used for sulphide ores and why?
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?
What is meant by refining of metals? Name the three common methods used for refining.
What is galvanized iron.
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
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.
Zinc blende is converted to oxide by ______ process.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
In extraction of copper, the flux used is ____________.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
