Question

(ii) A transition metal can act as a good catalyst when it shows
oxidation states.
(i) variable
(ii) only one
(iii) only zero​

Answer 1

Answer:

Transition metals can both give and accept electrons easily, thereby making them favorable as catalysts. The oxidation state of a metal refers to the ability of the metal to form chemical bonds.

Answer 2

A transition metal can act as a good catalyst when it shows a variable oxidation state (option-i).

• All the elements of d-block are transition metal (except - Zn which is non-transition d-block metal).
• These metals act as good catalysts to enhance the rate of reaction.
• Because transition metals show variable oxidation states that vary from +1 to +7 oxidation state.
• They have a high number of unpaired electrons in their d-subshell and highly unstable d-subshell.
• These metals form strong metallic bonds with a variety of metal due to their variable oxidation state. Hence, act as a good catalyst.