1
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
The isoelectronic set of ions is :
A
F, Li+, Na+ and Mg2+
B
Li+, Na+, O2- and F-
C
N3–, O2-, F- and Na+
D
N3–, Li+, Mg2+ and O2-
2
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
Consider the hydrated ions of Ti2+, V2+, Ti3+, and Sc3+. The correct order of their spin-only magnetic moments is :
A
Sc3+ < Ti3+ < V2+ < Ti2+
B
Sc3+ < Ti3+ < Ti2+ < V2+
C
Ti3+ < Ti2+ < Sc3+ < V2+
D
V2+ < Ti2+ < Ti3+ < Sc3+
3
JEE Main 2019 (Online) 10th April Morning Slot
+4
-1
The graph between $${\left| \psi \right|^2}$$ and r (radial distance) is shown below. This represents :
A
3s orbital
B
2s orbital
C
2p orbital
D
1s orbital
4
JEE Main 2019 (Online) 9th April Evening Slot
+4
-1
Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect ? (The Bohr radius is represented by a0)
A
The probability density of finding the electron is maximum at the nucleus.
B
The electron can be found at a distance 2a0 from the nucleus
C
The total energy of the electron is maximum when it is at a distance a0 from the nucleus.
D
The magnitude of potential energy is double that of its kinetic energy on an average.
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