Which from following is NOT a lanthonoid element?

For the reaction, $A+3 B \longrightarrow 2 C$

rate of consumption of A is $1.4 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~sec}^{-1}$. Calculate rate of formation of C ?

Identify the major product obtained in the following reaction.

Chlorobenzene $\xrightarrow[A \text { Anhydrous } \mathrm{FFCl}_3]{\mathrm{Cl}_2}$ major product

What is EAN of Cu in $\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$ ?