Extraction of copper by smelting uses silica as an additive to remove

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General Principles and processes of Isolation of Elements

medium

Extraction of copper by smelting uses silica as an additive to remove

$Cu_2O$

$FeS$

$FeO$

$Cu_2S$

(JEE MAIN-2016)

Solution

$FeO$ is gangue and $SiO_2$ is flux to form slag $FeSiO_3$

$\mathop {FeO}\limits_{{\text{Basic impurity}}} + \mathop {Si{O_2}}\limits_{{\text{acidic flux}}} \longrightarrow \mathop {FeSi{O_3}}\limits_{{\text{slag}}} $

Standard 12

Chemistry

Which method is not correct given for refining of crude metals?

easy

Match List$-I$ and List$-II :$

List$-I$ List$-II $

$(a)$ Haematite
$(i)$

$Al _{2} O _{3} \cdot xH _{2} O$

$(b)$ Bauxite $(ii)$
$Fe _{2} O _{3}$

$(c)$ Magnetite $(iii)$ $CuCO _{3} \cdot Cu ( OH )_{2}$

$(d)$ Malachite $(iv)$ $Fe _{3} O _{4}$

Choose the correct answer from the options given below :

medium

(JEE MAIN-2021)

Consider two chemical reactions $(A)$ and $(B)$ that take place during metallurgical process:

$(A)$ $\mathrm{ZnCO}_{3(\mathrm{~s})} \longrightarrow \mathrm{A}{\longrightarrow} \mathrm{ZnO}_{(\mathrm{s})}+\mathrm{CO}_{2(\mathrm{~g})}$

$(B)$ $2 \mathrm{ZnS}_{(\mathrm{s})}+3 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow \mathrm{ZnO}_{(\mathrm{s})}+2 \mathrm{SO}_{2(\mathrm{~g})}$

The correct option of names given to them respectively is:

hard

(JEE MAIN-2021)

Carbon cannot be used in the reduction of $Al_2O_3$ because :

medium

Which of the following methods are not used to refine any metal?

$(A)$ Liquation $(B)$ Calcination $(C)$ Electrolysis $(D)$ Leaching $(E)$ Distillation

Choose the correct answer from the options given below.

easy

(JEE MAIN-2022)

	List$-I$		List$-II $
$(a)$	Haematite	$(i)$	$Al _{2} O _{3} \cdot xH _{2} O$
$(b)$	Bauxite	$(ii)$	$Fe _{2} O _{3}$
$(c)$	Magnetite	$(iii)$	$CuCO _{3} \cdot Cu ( OH )_{2}$
$(d)$	Malachite	$(iv)$	$Fe _{3} O _{4}$

Extraction of copper by smelting uses silica as an additive to remove

Solution

Similar Questions

Which method is not correct given for refining of crude metals?

Match List$-I$ and List$-II :$ List$-I$ List$-II $ $(a)$ Haematite $(i)$ $Al _{2} O _{3} \cdot xH _{2} O$ $(b)$ Bauxite $(ii)$ $Fe _{2} O _{3}$ $(c)$ Magnetite $(iii)$ $CuCO _{3} \cdot Cu ( OH )_{2}$ $(d)$ Malachite $(iv)$ $Fe _{3} O _{4}$ Choose the correct answer from the options given below :

Carbon cannot be used in the reduction of $Al_2O_3$ because :

Which of the following methods are not used to refine any metal? $(A)$ Liquation $(B)$ Calcination $(C)$ Electrolysis $(D)$ Leaching $(E)$ Distillation Choose the correct answer from the options given below.

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Which of the following methods are not used to refine any metal?

$(A)$ Liquation $(B)$ Calcination $(C)$ Electrolysis $(D)$ Leaching $(E)$ Distillation

Choose the correct answer from the options given below.