The number of unpaired electrons is maximum in (Atomic no. : $ Ti = 22; V= 23; Cr = 24; Fe = 26$)
$Cr$
$Fe$
$V$
$Sc$
Why does copper not replace hydrogen from acids?
Which of the following metals make the most efficient catalyst
The anode mud in the electrolytic refining of silver contains
In $d-$ block $3d$ series, which of the following element has maximum size ?