JEE Main · 2016 · 03 Apr 2016 · Offline · General Principles and Processes of Isolation of Metals

Which one of the following ores is best concentrated by froth floatation method?

(A)Siderite
(B)Galena✓ Correct
(C)Malachite
(D)Magnetite

Answer: (B)

Solution

Froth flotation lets an oily froth pick up water-repellent sulphide particles, so it is the method of choice for sulphide ores. Of the four, galena is

PbS

, a sulphide, and is concentrated this way. Siderite

FeCO X_{3}

, malachite

Cu X_{2} (OH) X_{2} CO X_{3}

and magnetite

Fe X_{3} O X_{4}

are carbonate or oxide ores and are not suited to froth flotation, so galena is the right choice.

JEE Main · 2016 · 03 Apr 2016 · Offline · 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 →