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1
JEE Main 2021 (Online) 26th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Given below are two statements :
Statement I : Sphalerite is a sulphide or of zinc and copper glance is a sulphide ore of copper.
Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a forth flotation method.
Choose the most appropriate answer from the options given below :
Statement I : Sphalerite is a sulphide or of zinc and copper glance is a sulphide ore of copper.
Statement II : It is possible to separate two sulphide ores by adjusting proportion of oil to water or by using 'depressants' in a forth flotation method.
Choose the most appropriate answer from the options given below :
2
JEE Main 2021 (Online) 26th August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Given below are two statements :
Statement I : The choice of reducing agents for metals extraction can be made by using Ellingham diagram, a plot of $$\Delta$$G vs temperature.
Statement II : The value of $$\Delta$$S increases from left to right in Ellingham diagram.
In the light of the above statements, choose the most appropriate answer from the options given below :
Statement I : The choice of reducing agents for metals extraction can be made by using Ellingham diagram, a plot of $$\Delta$$G vs temperature.
Statement II : The value of $$\Delta$$S increases from left to right in Ellingham diagram.
In the light of the above statements, choose the most appropriate answer from the options given below :
3
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following set of elements can be detected using sodium fusion extract?
4
JEE Main 2021 (Online) 27th July Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
The addition of silica during the extraction of copper from its sulphide ore :-
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