Advertisements
Advertisements
प्रश्न
Identify who I am!
Ore of Aluminum- ______
Advertisements
उत्तर
Ore of Aluminum- Bauxite
APPEARS IN
संबंधित प्रश्न
Name one metal which is extracted by reduction with carbon.
Name the gas evolved when cinnabar ore is roasted.
Which of the following metals can be obtained from haematite ore?
(a) copper
(b) sodium
(c) zinc
(d) iron
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnesium
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
Identify the process given in following passage and draw neat labelled diagram showing the process.
Electrolysis of molten mixture of alumina (melting point > 20000C) is done in a steel tank. The tank has a graphite lining on the inner side. This lining does the work of a cathode. A set of graphite rods dipped in the molten electrolyte works as anode. Cryolite (Na3AlF6) and fluorspar (CaF2) are added in the mixture to lower its melting point upto 10000C.
Give the chemical formula of :
Sodium aluminate
Define the term:
Flux
Compare the process of calcination and roasting.
Name a non- metal that has a metallic luster and sublimes on heating.
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Write the name.
The process of strong heating of carbonate ores in insufficient air–
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Write the molecular formulae of the following compound.
Fluorspar
Explain Bayer’s process.
Explain the following reaction with the balanced equation.
Ferric oxide is reacted with aluminium.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
Complete flow chart given below.
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give a reason why Aluminium is preferably used in thermite reactions.
