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1
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
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-1
Out of Syllabus
Given below are two statements :
Statement I : In froth floatation method of rotating paddle agitates the mixture to drive air out of it.
Statement II : Iron pyrites and 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 :
2
JEE Main 2023 (Online) 25th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following reactions does not occur during extraction of copper?
3
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
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-1
Out of Syllabus
The metal which is extracted by oxidation and subsequent reduction from its ore is :
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JEE Main 2023 (Online) 24th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Match List I with List II
| List-I |
List-II |
||
|---|---|---|---|
| A. | Reverberatory furnace | I. | Pig Iron |
| B. | Electrolytic cell | II. | Aluminium |
| C. | Blast furnace | III. | Silicon |
| D. | Zone Refining furnace | IV. | Copper |
Choose the correct answer from the options given below :
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