Chemistry
Aluminium powder is used in thermite welding because :
- it is strong reducing agent
- it is strong oxidizing agent
- it is corrosion resistant
- it is a good conductor of heat.
Related Questions
Heating an ore in a limited supply of air or in the absence of air at a temperature just below it's melting point is known as :
- Smelting
- Ore dressing
- Calcination
- Bessemerisation
Name the following :
(i) The property possessed by metals by which they can be beaten into sheets.
(ii) A compound added to lower the fusion temperature of electrolytic bath in the extraction of aluminium.
(iii) The ore of zinc containing its sulphide.
The following questions relate to the extraction of aluminium by electrolysis :
(i) Name the other aluminium containing compound added to alumina and state it's significance.
(ii) Give the equation for the reaction that takes place at the cathode.
(iii) Explain why is it necessary to renew the anode periodically.
State the main components of the following alloys :
(i) Brass
(ii) Duralumin
(iii) Bronze.