Which of the following molecular orbitals has two nodal planes?

Which of the following is planar due to back bonding?

When the reaction $O_2 + e^- \to O_2^-$ occurs,identify the molecular orbital into which the electron is added.

Given below are two statements:
Statement $I$: $A$ $\pi$ bonding $MO$ has lower electron density above and below the inter-nuclear axis.
Statement $II$: The $\pi^*$ antibonding $MO$ has a node between the nuclei.
In the light of the above statements,choose the most appropriate answer from the options given below:

The pairs of species of oxygen and their magnetic behaviour are noted below. Which of the following presents the correct description?

Which of the following molecules has a bond order greater than $1$?