Chemistry

In the following reaction sequence, structures of $A$ and $B$ respectively will be

The number of possible optical isomers for the complexes ${\mathrm{M}\mathrm{A}}_2{\mathrm{B}}_2$ with ${\mathrm{s}\mathrm{p}}^3$ and $\mathrm{d}\mathrm{s}\mathrm{p}{\mathrm{p}}^2$  hybridized metal atom, respectively is:
[Note: A and B are unidentate neutral and unidentate monoanionnic ligands, respectively]

Consider the following reactions:

Which of these reactions are possible?

The equation that is incorrect is

In the following reaction sequence

For the reaction

$2{\mathrm{H}}_2\left(\mathrm{g}\right)+2\mathrm{N}\mathrm{O}\left(\mathrm{g}\right)?{\mathrm{N}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}$ , the observed rate expression is, rate = ${\mathrm{k}}_{\mathrm{f}}[\mathrm{N}\mathrm{O}{]}^2\left[{\mathrm{H}}_2\right]$ . The rate expression for the reverse reaction is:

Identify the correct labels of $\mathrm{A},\mathrm{B}$ and $\mathrm{C}$ in the following graph from the options given below

Root mean square speed $\left({\mathrm{V}}_{\mathrm{r}\mathrm{m}\mathrm{s}}\right)$ ; most probable speed $\left({\mathrm{V}}_{\mathrm{m}\mathrm{p}}\right)$ ; Average $\mathrm{s}\mathrm{p}\mathrm{e}\mathrm{e}\mathrm{d}?\left({\mathrm{V}}_{\mathrm{a}\mathrm{v}}\right)$

Within each pair of elements $\mathrm{F}\&\mathrm{C}\mathrm{l},\mathrm{S}\&\mathrm{S}\mathrm{e}$ and $\mathrm{L}\mathrm{i}\&\mathrm{N}\mathrm{a}$ , respectively, the elements that release more energy upon an electron gain are

The redox reaction among the following is

What are the major differences between valence bond theory & Molecular Orbital Theory?