1
JEE Main 2021 (Online) 31st August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Arrange the following conformational isomers of n-butane in order of their increasing potential energy :

JEE Main 2021 (Online) 31st August Evening Shift Chemistry - Basics of Organic Chemistry Question 85 English
A
II < III < IV < I
B
I < IV < III < II
C
II < IV < III < I
D
I < III < IV < II
2
JEE Main 2021 (Online) 31st August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Choose the correct name for compound given below :

JEE Main 2021 (Online) 31st August Morning Shift Chemistry - Basics of Organic Chemistry Question 88 English
A
(4E)-5-Bromo-hex-4-en-2-yne
B
(2E)-2-Bromo-hex-4-yn-2-ene
C
(2E)-2-Bromo-hex-2-en-4-yne
D
(4E)-5-Bromo-hex-2-en-4-yne
3
JEE Main 2021 (Online) 31st August Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R) :

Assertion (A) : A simple distillation can be used to separate a mixture of propanol and propanone.

Reason (R) : Two liquids with a difference of more than 20$$^\circ$$ in their boiling points can be separated by simple distillations.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
(A) is false but (R) is true.
B
Both (A) and (R) are correct but (R) is not the correct explanation of (A)
C
(A) is true but (R) is false
D
Both (A) and (R) are correct and (R) is the correct explanation of (A).
4
JEE Main 2021 (Online) 27th August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The compound/s which will show significant intermolecular H-bonding is/are :

JEE Main 2021 (Online) 27th August Evening Shift Chemistry - Basics of Organic Chemistry Question 89 English
A
(b) only
B
(c) only
C
(a) and (b) only
D
(a), (b) and (c)
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