Match List I with List II.
|(B)||Malachite||(II)||CuCO$$_3$$ . Cu(OH)$$_2$$|
Choose the correct answer from the options given below :
In isolation of which one of the following metals from their ores, the use of cyanide salt is not commonly involved?
In the metallurgical extraction of copper, following reaction is used :
FeO + SiO2 $$\to$$ FeSiO3
FeO and FeSiO3 respectively are.
Given are two statements one is labelled as Assertion A and other is labelled as Reason R.
Assertion A : Magnesium can reduce Al2O3 at a temperature below 1350$$^\circ$$C, while above 1350$$^\circ$$C, while above 1350$$^\circ$$C aluminium can reduce MgO.
Reason R : The melting and boiling points of magnesium are lower than those of aluminium.
n light of the above statements, choose most appropriate answer from the options given below :