Advertisements
Advertisements
Question
_______ is the least reactive metal.
Options
silver
sodium
zinc
gold
Advertisements
Solution
Gold is the least reactive metal.
APPEARS IN
RELATED QUESTIONS
Name the following:
Main ore of aluminium.
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.
In the extraction of aluminium: Why is it necessary to replace anodes time to time?
Name the gas produced when calamine ore is calcined.
Name three other metals which are extracted in a manner similar to sodium.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
Which of the following is an iron ore?
(a) cinnabar
(b) calamine
(c) haematite
(d) rock salt
The metal which can be extracted from pyrolusite ore is:
(a) mercury
(b) manganese
(c) aluminium
(d) magnesium
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
Give the principles of the froth floatation process.
Give the principles of electromagnetic separation.
Name the following:
The mixture of materials fed into a furnace to extract a metal.
Explain the following:
Galvanization protects iron from rusting.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Complete the following by selecting the correct option from the choices given:
The metal which does not react with water or dilute H2SO4 but reacts with concentrated H2SO4 is _________
Zinc sulphide : Roasting : : zinc carbonate : _______
The electrolysis of alumina involves the use of fluorspar and cryolite to increase the melting point.
Write the molecular formulae of the following compound.
Sodium aluminate
Complete flow chart given below.
