Minerals and ores - Free MCQ Practice Test with solutions, JEE Chemistry
MCQ Practice Test & Solutions: Test: Minerals and ores (15 Questions)
You can prepare effectively for JEE Chemistry for JEE Main & Advanced with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Minerals and ores". These 15 questions have been designed by the experts with the latest curriculum of JEE 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 20 minutes
- - Number of Questions: 15
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Which of the following statement is not correct about Ellingham diagram?
Detailed Solution: Question 1
Which of the ore dressing process requires finest size of ore?
Detailed Solution: Question 2
Which among the following is used as flux in the extraction of iron from oxide ores?
Detailed Solution: Question 3
is electrolysed using platinum electrodes,Detailed Solution: Question 4
Which of the following is not added during the extraction of silver by cyanide process?
Detailed Solution: Question 5
Detailed Solution: Question 6
is cryolite and used in the electrolysis of alumina to lower the melting point and increase electrical conductivity.The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.
Detailed Solution: Question 7
, calcium carbonate is almost completely decomposed to give 
which acts as a flux and combines with 
present as impurity (gangue) in the ore to form calcium silicate (fusible slag)
(acidic flux) Aluminium is extracted from alumina 
by electrolysis of a molten mixture of
by electrolysis of a molten mixture ofDetailed Solution: Question 8
is a bad conductor of electricity. Therefore, cryolite 
and fluorspar 
are added to purified alumina which not onlymake alumina a good conductor of electricity but also reduce the melting point of the mixture to around 
.Detailed Solution: Question 9
Consider the following metallurgical processes:
(I) Heating impure metal CO and distilling the resulting volatile carbonyl (b.p. 
) and finally decomposition at 
to get the pure metal
(II) Heating the sulphide ore in air until a part is converted to oxide and then furher heating in the absence of air to let the oxide react with unchanged metal sulphide
(III) Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and 
to obtained the metal The processes used for obtaning magnesium, nickel and copper are respectively:
(I) Heating impure metal CO and distilling the resulting volatile carbonyl (b.p.
) and finally decomposition at to get the pure metal(II) Heating the sulphide ore in air until a part is converted to oxide and then furher heating in the absence of air to let the oxide react with unchanged metal sulphide
(III) Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and
to obtained the metal The processes used for obtaning magnesium, nickel and copper are respectively:Detailed Solution: Question 10
When copper pyrites is roasted in excess of air, a mixture of 
is formed. 
is present as impurity. This can be removed as slag during reduction of 
. The flux added to form slag is
is formed. is present as impurity. This can be removed as slag during reduction of . The flux added to form slag isDetailed Solution: Question 11
What is the role of limestone during the extraction of iron from haematite ore?
Detailed Solution: Question 12
, spongy iron is obtained. In slag zone 
, limestone reacts with impurity (e.g., silica) to form slag. In the combustion and fusion zone 
, all the charge melts and pig iron is obtained which purified further.In the extraction of aluminium by Hall-Heroult process, purified 
is mixed with 
to
(i) lower the melting point of 
.
(ii) increase the conductivity of molten mixture.
(iii) reduce 
into 
.
(iv) acts as catalyst.
is mixed with to(i) lower the melting point of
.(ii) increase the conductivity of molten mixture.
(iii) reduce
into .(iv) acts as catalyst.
Detailed Solution: Question 13
In Hall-Heroult process how much carbon anode is burnt away to produce each 
of aluminium?
of aluminium?Detailed Solution: Question 14
of 
produced, about 
of carbon anode is burnt away.Which statement is incorrect regarding Hall-Heroult process for metallurgy of aluminium?
1. Use of 
lowers the melting point of 
2. Steel vessel with lining of carbon acts as cathode.
3. Graphite is used as anode.
4. Carbon dioxide gas is generated at cathode.
1. Use of
lowers the melting point of 2. Steel vessel with lining of carbon acts as cathode.
3. Graphite is used as anode.
4. Carbon dioxide gas is generated at cathode.
Detailed Solution: Question 15
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