(i) Which of the first row transition metal exhibit +7 oxidation state? (ii) How would you account for the irregular variation of 1st and 2nd ionisation enthalpies in the 1st series of transition elements ? (iii) What are interstitial compounds ? (iv) Give two uses of potassium permanganate.

How would you account for the irregular of ionisation enthalpies (first) in the first series of the transition elements?

Which metal in the first series of transition metals exhibits+1 oxidation state most frequently and why?

which metal in the first series of transition metals exhibits +1 oxidation state most frequently and why?

Statement-1: 1st and 2nd ionisation enthalpies in the first series of transition elements vary irregularly. Statement-2: Variation depends on the stability of d-configuration.

Answer the following questions (i) Which element of the first transition series has highest second ionisation enthalpy? (ii) Which element of the first transition series has highest third ionisation enthalpy? (iii) Which element of the first transition series has lowest enthalpy of atomisation? (b) Identify the metal and justify your answer. (i) Carbonyl M(CO)_(5) (ii) MO_(3)F