Identify 'A' in following reaction.

A $$\mathrm{\buildrel {Dimethyl\,cadmium} \over \longrightarrow}$$ propanone + cadmium chloride

What is the resistance of $$0.01 ~\mathrm{M} ~\mathrm{KCl}$$ solution if its conductivity is $$200 ~\mathrm{ohm}^{-1} \mathrm{cn}^{-1}$$ and cell constant is $$1 \mathrm{~cm}^{-1}$$ ?

Which of the following concepts is NOT of valence bond theory?

Which among the following is a pair of dicarboxylic acids?