The purification of alumina is called
Baeyer's process
Bosch process
Castuer process
Hoop's process.
The element which is the most abundant in the earth crust is
O
S
Al
H
A.
O
Oxygen is the most abundant element in the earth's crust. (above 45.5 wt %).
Given below, catalyst and corresponding process/ reaction are matched. The mismatch is
[RhCl(PPh3)2] : Hydrogenation
TiCl4+ Al(C2H5)3 : Polymerization
V2O5 : Haber-Bosch process
nickel : Hydrogenation.
In Mc Arthur Forest method , silver is extracted from the solution of Na[Ag(CN)2] by the use of :
Fe
Mg
Cu
Zn
Assertion : Extraction of iron metal from iron oxide ore is carried out by heating with coke.
Reason : The reaction Fe2O3 (s) → Fe (s) + O2 (g) is a spontaneous process.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.