Chemistry - Complete d-block Question with Solution | TestHub

ChemistryComplete d-blockd-blockMedium2 minPYQ_2025

ChemistryMediumsingle choice

The number of valence electrons present in the metal among $Cr, Co, Fe$ and Ni which has the lowest enthalpy of atomisation is

Answer:

Solution:

Out of $Cr, Co, Fe$ and $Ni$
Chromium has lowest heat of atomisation.
$Cr = [Ar] 3 d^{5} 4 s^{1}$
$∵$ Total six valence $e^{-}$ in $Cr$ .

Stream:JEESubject:ChemistryTopic:Complete d-blockSubtopic:d-block

⏱ 2mℹ️ Source: PYQ_2025

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