Question

Match the list I and II and pick the correct matching from the codes given below.

	List I (Metals)		List II (Ore)
(A)	Aluminium	(1)	Bauxite
(B)	Copper	(2)	Dolomite
(C)	Potassium	(3)	Pyrites
(D)	Magnesium	(4)	Pitchblende
(E)	Radium	(5)	Sylvine

• A. $A-4,B-5,C-2,D-1,E-3$
• B. $A-1,B-3,C-4,D-5,E-2$
• C. $A-1,B-3,C-4,D-2,E-5$
• D. $A-1,B-3,C-5,D-2,E-4$

Answer 1

The correct option is D $A-1,B-3,C-5,D-2,E-4$

(A) Bauxite is the most important ore of aluminium. Bauxite is hydrated aluminium oxide having the formula ${\text{Al}}_2{\text{O}}_3\cdot 2{\text{H}}_2\text{O}$
(B) Copper is extracted from its principal ore copper pyrites. $\left(CuFe{S}_2\right)$. The copper pyrite gets converted to a mixture $C{u}_{2}S$ and $FeS$.

$2{\text{CuFeS}}_2+{\text{O}}_2\to {\text{Cu}}_2\text{S}+2\text{FeS}+{\text{SO}}_2$

(C) Sylvine, is an ore of sodium and potassium metals. Sylvine is a mixture of sodium chloride and potassium chloride $\left(KCl\right)$.
(D) Dolomite is a magnesium ore with the general formula ${\text{MgCO}}_3\cdot {\text{CaCO}}_3$
(E) Pitchblende is also called uraninite, which is black in colour, like ‘pitch’. Hence it is called Pitchblende. It is a mineral of uranium-containing $U{O}_2$ and $U{O}_3$.
Pitchblende also contains helium, lead, radium, thorium, actinide elements and
many other radioactive elements that can be traced back to the decay of uranium. Hence, the correct order is

$A-1,B-3,C-5,D-2,E-4$