Advertisements
Advertisements
प्रश्न
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
पर्याय
Cu, Fe, Zn, Al
Al, Cu, Fe, Zn
Zn, Al, Cu, Fe
Fe, Zn, Al, Cu
Advertisements
उत्तर
Cu, Fe, Zn, Al
APPEARS IN
संबंधित प्रश्न
In the extraction of aluminium: Name the process of concentration of bauxite.
In the extraction of aluminium Write the cathode reaction in electrolytic reduction of alumina.
Name two metals which are highly resistant to corrosion.
Why are the metals like Na, K, Ca and Mg never found in their free state in nature?
How is manganese extracted from manganese dioxide, MnO2? Explain with the help of an equation.
Which metal is extracted from bauxite ore?
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg
Which of the following reactants are used to carry out the thermite reaction required for welding the broken railway tracks?
(a) Al2O3 + Fe
(b) MnO2 + Al
(c) Fe2O3 + Al
(d) Cu2O + Fe
Aluminum is used in thermite welding:
what is thermit?
Name a non- metal that has a metallic luster and sublimes on heating.
Name the following:
A compound which is added to lower the fusion temperature of the electrolytic bath in the extraction of aluminium.
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 molecular formula of main ore of aluminium –
Write the name.
The process of extraction of aluminium from alumina-
Explain the concept of Calcination.
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
The poorest conductor of heat among metals is ____________.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
Assertion (A): The extraction of metals from their sulphide ores cannot take place without roasting the ore.
Reason (R): Roasting converts sulphide ores directly into metals.
