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JEE-MAIN SERIES
Chemistry

Concentration Of Ores

9 previous year questions.

Volume: 9 Ques
Yield: Medium

High-Yield Trend

3
2023
3
2022
3
2019

Chapter Questions
9 MCQs

01
PYQ 2019
medium
chemistry ID: jee-main
The ore that contains both iron and copper is:
1
malachite
2
dolomite
3
azurite
4
copper pyrites
02
PYQ 2019
medium
chemistry ID: jee-main
The correct statement regarding the given Ellingham diagram is:
1
At , can be used for the extraction of from
2
At coke can be used for the extraction of from
3
Coke cannot be used for the extraction of from .
4
At can be used for the extraction of from
03
PYQ 2019
medium
chemistry ID: jee-main
The idea of froth floatation method came from a person and this method is related to the process of ores. and , respectively, are:
1
fisher woman and concentration
2
washer man and reduction
3
washer woman and concentration
4
fisher man and reduction
04
PYQ 2022
medium
chemistry ID: jee-main

The compound(s) that is(are) removed as slag during the extraction of copper is
(A)CaO,(B)FeO,(C)Al2O3,(D)ZnO,(E)NiO
Choose the correct answer from the options given below :

1
(C), (D) only
2
(A), (B), (E) only
3
(A), (B) only
4
(B) only
05
PYQ 2022
medium
chemistry ID: jee-main
Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex [A], which on reaction with zinc forms the elemental gold and another complex [B]. [A] and [B], respectively are :
1
and
2
and
3
and
4
and
06
PYQ 2022
medium
chemistry ID: jee-main
Among the following ores Bauxite, Siderite, Cuprite, Calamine, Haematite, Kaolinite, Malachite, Magnetite, Sphalerite, Limonite, Cryolite, the number of principal ores of iron is____.
07
PYQ 2023
medium
chemistry ID: jee-main
Which of the following metals can be extracted through alkali leaching technique?
1
Cu
2
Au
3
Sn
4
Pb
08
PYQ 2023
medium
chemistry ID: jee-main
Given below are two statements:
Statement I : In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II : Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer from the options given below:
1
Both Statement I and Statement II are false
2
Both Statement I and Statement II are true
3
Statement I is false but Statement II is true
4
Statement I is true but Statement II is false
09
PYQ 2023
medium
chemistry ID: jee-main

The methods NOT involved in concentration of ore are
A Liquation
B Leaching
C Electrolysis
D Hydraulic washing
E Froth floatation
Choose the correct answer from the options given below :

1
B, D and E only
2
and only
3
and only
4
B, D and C only

About Concentration Of Ores - JEE-MAIN

Concentration Of Ores is a vital chapter for JEE-MAIN aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

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