JEE Main · 2020 · 07 Jan 2020 · Shift 2 · General Principles and Processes of Isolation of Metals

The refining method used when the metal and the impurities have low and high melting temperatures, respectively is

(A)zone refining
(B)vapour phase refining
(C)liquation✓ Correct
(D)distillation

Answer: (C)

Solution

Liquation is the method chosen when the metal melts at a far lower temperature than its impurities. The impure metal is warmed on a sloping hearth until it melts and runs down, leaving the high-melting impurities behind on the hearth. It suits low-melting metals such as tin and lead.

JEE Main · 2020 · 07 Jan 2020 · Shift 2 · Single correct option

Practise more: all JEE Main PYQs on General Principles and Processes of Isolation of Metals →

More JEE Main questions on General Principles and Processes of Isolation of Metals

The molar mass of the water insoluble product formed from the fusion of chromite ore $(FeCr_{2} O_{4})$ with $Na_{2} CO_{3}$ in presence of $O_{2}$ is ______ $g mol^{- 1}$ .
JEE Main 2025View solution →
In Hall - Heroult process, the following is used for reducing $Al_{2} O_{3}$ :-
JEE Main 2023View solution →
Which of the following metals can be extracted through alkali leaching technique?
JEE Main 2023View solution →
Which of the following is used as a stabilizer during the concentration of sulphide ores?
JEE Main 2023View solution →
In the extraction process of copper, the product obtained after carrying out the reactions
(i) $2 Cu_{2} S + 3 O_{2} \to 2 Cu_{2} O + 2 SO_{2}$
(ii) …
JEE Main 2023View solution →
Given below are two statements :

Statement-I : In the metallurgy process, sulphide ore is converted to oxide before reduction.

Statement-II : Oxide ores in general are easier to reduce.

In the light of the above statements, choose the most appropriate answer from the options g …
JEE Main 2023View solution →