1
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
[P] on treatment with Br2/FeBr3 in CCl4 produced a single isomer C8H7O2Br while heating [P] with sodalime gave toluene. The compound [P] is
A
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 142 English Option 1
B
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 142 English Option 2
C
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 142 English Option 3
D
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 142 English Option 4
2
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
When neopentyl alcohol is heated with an acid, it slowly converted into an 85 : 15 mixture of alkenes A and B, respectively. What are these alkenes?
A
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Alcohols, Phenols and Ethers Question 109 English Option 1
B
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Alcohols, Phenols and Ethers Question 109 English Option 2
C
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Alcohols, Phenols and Ethers Question 109 English Option 3
D
JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Alcohols, Phenols and Ethers Question 109 English Option 4
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The ionic radii of O2–, F, Na+ and Mg2+ are in the order :
A
F > O2– > Na+ > Mg2+
B
Mg2+ > Na+ > F > O2–
C
O2– > F > Mg2+ > Na+
D
O2– > F > Na+ > Mg2+
4
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The region in the electromagnetic spectrum where the Balmar series lines appear is :
A
Microwave
B
Ultraviolet
C
Visible
D
Infrared
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