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Test Index
JEE Main Chemistry Class 11 Classification of Elements and Periodicity in Properties 2 Questions
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Question : 3
Total: 36
The correct order of the first ionization enthalpy is
[4 Apr 2024 Shift 2]
Al
>
Ga
>
Tl
Ga
>
Al
>
B
B
>
Al
>
Ga
Tl
>
Ga
>
Al
Validate
Solution:
(i) due to lanthanide contraction
T
ℓ
has more I.E.
as compared to
Ga
and
A
ℓ
(ii) due to scandide contraction Ga has more I.E. as compared to
A
ℓ
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