1
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Assertion A : Enol form of acetone [CH3COCH3] exists in < 0.1% quantity. However, the enol form of acetyl acetone [CH3COCH2OCCH3] exists in approximately 15% quantity.

Reason R : Enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.

Choose the correct statement :
A
Both A and R are true but R is not the correct explanation of A
B
A is true but R is false
C
A is false but R is true
D
Both A and R are true and R is the correct explanation of A
2
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Given below are two statements :

Statement I : The Eo value for Ce4+ / Ce3+ is + 1.74 V.

Statement II : Ce is more stable in Ce4+ state than Ce3+ state.

In the light of the above statements, choose the most appropriate answer from the options given below :
A
Statement I is incorrect but statement II is correct
B
Both statement I and statement II are correct
C
Both statement I and statement II are incorrect
D
Statement I is correct but statement II is incorrect
3
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In chromotography technique, the purification of compound is independent of :
A
Solubility of the compound
B
Mobility or flow of solvent system
C
Physical state of the pure compound
D
Length of the column or TLC plate
4
JEE Main 2021 (Online) 16th March Morning Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Given below are two statements :

Statement I : H2O2 can act as both oxidising and reducing agent in basic medium.

Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen.

In the light of the above statements, choose the correct answer from the options given below :
A
Both statement I and statement II are false
B
Statement I is false but statement II is true
C
Statement I is true but statement II is false
D
Both statement I and statement II are true
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