Home Chemistry D and F - Block Elements Mix Which of the statements is False ?
Chemistry D and F - Block Elements Mix Single Correct MCQ
Published on: August 12, 2026

Which of the statements is False ?

A
In 3d series, there is a regular increase in the first ionisation enthalpy of transition elements from left to right.
B
d-block element act as a catalyst.
C
The decreases in metallic radius coupled with increase in atomic mass results in a general increase in the density of transition elements from Ti to Cu.
D
The higher oxidation state are favoured by the heavier elements (i.e. heavier members) in the groups of d-block.

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The correct answer is:
A

There is irregular trend in the first ionisation enthalpy of the 3d metals.

Se Ti V Cr Mn Fe Co Ni Cu Zn

In kJ/mol : 631 656 650 653 717 762 758 736 745 906

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