List of top Chemistry Questions on Electronic Configuration asked in JEE Main

Which of the following statement(s) is/are true?
A. If two orbitals have the same value of $(n+l)$, the orbital with lower value of $n$ will have lower energy.
B. Energies of the orbitals in the same subshell increase with increase in atomic number.
C. The size of $2p_x$ orbital is less than the size of $3p_x$ orbital.
D. Among 5f, 6s, 4d, 5p and 5d orbitals, none of the orbitals have 2 radial nodes.
Choose the correct answer from the options given below :

Which of the following pictorial diagram most correctly represents the \( \pi^* \) (\( \pi \) - antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction ( \( \xrightarrow{\text{z-axis}} \) )?}

Arrange the following atomic orbitals of multi electron atoms in order of increasing energy.
A. \(n=3, l=2, m=+1\)
B. \(n=4, l=0, m=0\)
C. \(n=6, l=1, m=0\)
D. \(n=5, l=1, m=+1\)
E. \(n=2, l=1, m=+1\)

Which of the following is correct set of 4 quantum numbers of 19th electron in Chromium (Atomic number = 24) in accordance with Aufbau principle?