1
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of these factors does not govern the stability of a conformation in acyclic compounds?
A
Angle strain
B
Torsional strain
C
Electrostatic forces of interaction
D
Steric interactions
2
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The ratio of the shortest wavelength of two spectral series of hydrogen spectrum is found to be about 9. The spectral series are :
A
Paschen and Pfund
B
Balmer and Brackett
C
Lyman and Paschen
D
Brackett and Pfund
3
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The highest possible oxidation states of uranium and plutonium, respectively are :
A
4 and 6
B
6 and 4
C
7 and 6
D
6 and 7
4
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In chromatography, which of the following statements is incorrect for Rf ?
A
Rf value depends on the type of chromatography.
B
Higher Rf value means higher adsorption.
C
Rf value is dependent on the mobile phase.
D
The value of Rf can not be more than one.

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