Advertisements
Advertisements
प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
Advertisements
उत्तर
The process of concentration of bauxite is known as Bayer’s process.
APPEARS IN
संबंधित प्रश्न
Name the following:
Main ore of aluminium.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
The metal which can be extracted simply by heating the cinnabar ore in air is:
(a) Zn
(b) Cu
(c) Al
(d) Hg
Give the principles of the hydrolytic method.
Give the principles of electromagnetic separation.
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
How many valence electrons are present in metals ?
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.
Name the following:
A steel grey coloured solid non-metal.
Zinc blende is converted to oxide by ______ process.
What is the difference between calcination and roasting?
_______ is the least reactive metal.
Find the odd one out and give its explanation.
Find the odd one out and give its explanation.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
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.
