Which one of the following properties is not of transition elements
Colour
Paramagnetism
Fixed valency
None of the above
The number of unpaired electrons is maximum in (Atomic no. : $ Ti = 22; V= 23; Cr = 24; Fe = 26$)
$(a)$ Transition metals can act as catalysts because these can change their oxidation state. How does $Fe(III)$ catalyse the reaction between iodide and persulphate ions ?
$(b)$ Mention any three processes where transition metals act as catalysts.
Which one of the following statements shows the correct percentage of carbon in steel, pig iron and wrought iron
Spiegeleisen is an alloy of
$Sc\, (Z = 21)$ is a transition element but $Zn\, (Z = 30)$ is not because