Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(increases, decreases, positive, efficient, 68, non-efficient, no α -hydrogen, α-hydrogen, negative, Rosenmund's, greater, Cannizzaro, 74, common-ion effect, lesser, buffer action, diamagnetic, paramagnetic)
The transition metals show ............. character because of the presence of unpaired electrons and Cu+ is ................... because its electronic configuration is [Ar]3d10.