Advertisements
Advertisements
प्रश्न
Why does a new aluminium vessel lose shine so soon after use?
उत्तर
Aluminium is highly reactive. It reacts with moist air and forms a thin layer of aluminium oxide on it. This layer fades away the shine of aluminium. Thus, aluminium vessels lose its shine soon after use.
APPEARS IN
संबंधित प्रश्न
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
How is sodium metal extracted? Explain with the help of equation of the reaction involved.
Zinc blende ore can be converted into zinc oxide by the process of:
(a) roasting
(b) hydrogenation
(c) chlorination
(d) calcination
Give the principles of electromagnetic separation.
Give the chemical formula of :
Cryolite
In electrolytic reduction of alumina _______ is used as a cathode.
Explain in brief types of extraction of highly reactive metals according to their reactivity.
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 the reason why the above reaction is known as a thermite reaction.
