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Question

Chemistry Question on properties of d block elements

The correct order of the first ionization enthalpies is:

A

Mn < Ti < Zn < Ni

B

Ti < Mn < Ni < Zn

C

Zn < Ni < Mn < Ti

D

Ti < Mn < Zn < Ni

Answer

Ti < Mn < Ni < Zn

Explanation

Solution

TiAr  3d2  4s2{Ti \to |Ar| \; 3d^2 \; 4s^2}
MnAr  3d5  4s2{Mn \to |Ar| \; 3d^5 \; 4s^2}
NiAr  3d8  4s2{Ni \to |Ar \; | 3d^8 \; 4s^2}
ZnAr  3d10  4s2{Zn \to |Ar| \; 3d^{10} \; 4s^2}
Correct order of I.P. is
[Ti < Mn < Ni < Zn]