Which one of the following is formed apart from sodium chloride when chlorine reacts with hot concentrated sodium hydroxide?

What is a capsomere?

The electronic configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+},$ and $Ni^{2+}$ are $3d^4, 3d^5, 3d^6,$ and $3d^8$ respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behavior?

The energy of the electron at infinite distance from the nucleus in Bohr's Model is taken as

The major product of the following reaction is

How many $mL$ of perhydrol is required to produce sufficient oxygen which can be used to completely convert $2 \ L$ of $SO_2$ gas to $SO_3$ gas (in $mL$)?