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1
JEE Main 2023 (Online) 10th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which of the following is used as a stabilizer during the concentration of sulphide ores?

A
Cresols
B
Xanthates
C
Fatty acids
D
Pine oils
2
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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In Hall - Heroult process, the following is used for reducing $$\mathrm{Al}_{2} \mathrm{O}_{3}$$ :-

A
Magnesium
B
$$\mathrm{CaF}_{2}$$
C
Graphite
D
$$\mathrm{Na}_{3} \mathrm{AlF}_{6}$$
3
JEE Main 2023 (Online) 8th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Which of the following metals can be extracted through alkali leaching technique?

A
$$\mathrm{Sn}$$
B
Cu
C
$$\mathrm{Au}$$
D
$$\mathrm{Pb}$$
4
JEE Main 2023 (Online) 6th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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The setting time of Cement is increased by adding :

A
Gypsum
B
Limestone
C
Clay
D
Silica
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