The method of zone refining of metals is based on the principle of

Important Questions on General Principles and Processes of Isolation of Metals (Metallurgy)

MEDIUM

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 17

Which of the following reactions is involved in the final step for the extraction of copper from copper pyrites in Bessemer converter?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 18

Which of the following is correct regarding the given diagram of reduction of haematite? 

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 19

Which of the following changes is not observed when an ore is heated during calcination?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 20

Which is incorrectly matched for refining of elements?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 21

Which one of the following is an ore of silver?

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 22

In the extraction of silver from the argentite ore, the ore is treated with a dilute solution of $\mathrm{NaCN}$ in water, in the presence of $\mathrm{Y}$. Whereby the following reaction takes place:
${\mathrm{Ag}}_2\mathrm{X}+4\mathrm{NaCN}+2\mathrm{Y}\to 2\mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN}{)}_2\right]+{\mathrm{Na}}_2{\mathrm{XO}}_4$. $\mathrm{X}$ and $\mathrm{Y}$ in this reaction are 

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 23

Which of the following processes are used for the extraction of $\mathrm{Mg}$ and $\mathrm{Ag}$ respectively? 

EASY

JEE Main

IMPORTANT

Chemistry Crash Course JEE Main>Chapter 13 - General Principles and Processes of Isolation of Metals (Metallurgy)>Level 2>Q 24

Which method is not corrective matched for refining of crude metals?