1
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
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A flask contains a mixture of isohexane and 3-methylpentane. One of the liquids boils at 63oC while the other boils at 60oC What is the best way to separate the two liquids and which one will be distilled out first ?
A
fractional distillation, 3-methylpentane
B
simple distillation, 3-methylpentane
C
fractional distillation, isohexane
D
simple distillation, isohexane
2
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :
A
496, 577, 786, 737
B
496, 737, 577, 786
C
786, 737, 577, 496
D
496, 577, 737, 786
3
JEE Main 2020 (Online) 8th January Morning Slot
Numerical
+4
-0
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The magnitude of work done by a gas that undergoes a reversible expansion along the path ABC shown in the figure is _______. JEE Main 2020 (Online) 8th January Morning Slot Chemistry - Thermodynamics Question 159 English
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4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The decreasing order of reactivity towards dehydrohalogenation (E1) reaction of the following compounds is : JEE Main 2020 (Online) 8th January Morning Slot Chemistry - Haloalkanes and Haloarenes Question 138 English
A
B $$>$$ D $$>$$ A $$>$$ C
B
D $$>$$ B $$>$$ C $$>$$ A
C
B $$>$$ A $$>$$ D $$>$$ C
D
B $$>$$ D $$>$$ C $$>$$ A

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