1
JEE Main 2020 (Online) 9th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following has the shortest C-Cl bond?
A
Cl–CH=CH–CH3
B
Cl–CH=CH–NO2
C
Cl–CH=CH–OCH3
D
Cl–CH=CH2
2
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The increasing order of basicity for the following intermediates is (from weak to strong)
JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 1 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 2 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 3 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 4 JEE Main 2020 (Online) 9th January Morning Slot Chemistry - Basics of Organic Chemistry Question 155 English 5
A
(iii) < (i) < (ii) < (iv) < (v)
B
(iii) < (iv) < (ii) < (i) < (v)
C
(v) < (i) < (iv) < (ii) < (iii)
D
(v) < (iii) < (ii) < (iv) < (i)
3
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Kjeldahl's method cannot be used to estimate nitrogen for which of the following compounds?
A
C6H5NH2
B
$${\rm{N}}{{\rm{H}}_2} - \mathop C\limits^{\mathop \parallel \limits^O } - {\rm{N}}{{\rm{H}}_2}$$
C
C6H5NO2
D
CH3CH2-C $$ \equiv $$ N
4
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
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
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