question_answer

Read the given passage carefully and fill in the blanks by choosing an appropriate option.

Oxides of ___i___ are reduced to their respective metals by heating with coke and the process is called ___ii___. Before carrying out reduction with carbon, if the calcined or roasted ore still contains infusible impurities of earthy matter, ___iii___, an additional substance, ___iv___ is added which combines with iii to form a fusible material, called ___v___.

 

A)

(i)	(ii)	(iii)	(iv)	(v)
Na and K	Thermite process	Silica	\[CaO\]	\[CaC{{O}_{3}}\]

               

B)

(i)	(ii)	(iii)	(iv)	(v)
Fe and Zn	Smelting	Gangue	Flux	Slag

               

C)

(i)	(ii)	(iii)	(iv)	(v)
Al and Cu	Aluminothermy	Gangue	\[NaOH\]	\[NaAl{{O}_{2}}\]

               

D)

(i)	(ii)	(iii)	(iv)	(v)
\[Au\] and \[Ag\]	Smelting	Silica	\[Si{{O}_{2}}\]	Slag