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JEE Main Chemistry Class 11 The P-Block Elements (Group 13-14) Questions
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Question : 19
Total: 91
Given below are two statements:
Statement I : The decrease in first ionization enthalpy from
B
to
Al
is much larger than that from
Al
to
Ga
.
Statement II : The d orbitals in Ga are completely filled.
In the light of the above statements, choose the most appropriate answer from the options given below
[29-Jan-2023 Shift 2]
Statement I is incorrect but statement II is correct.
Both the statements I and II are correct
Statement I is correct but statement II is incorrect
Both the statements I and II are incorrect
Validate
Solution:
The first ionization energies (as in NCERT) are as follows:
B
:
801
kJ
∕
mol
Al
:
577
kJ
∕
mol
Ga
:
579
kJ
∕
mol
Ga
:
[
Ar
]
3
d
10
4
s
2
4
p
1
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