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1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be:
A
– 5.1 eV
B
–10.2 eV
C
+ 2.55 eV
D
– 2.55 eV
2
AIEEE 2012
MCQ (Single Correct Answer)
+4
-1
The increasing order of the ionic radii of the given isoelectronic species is :
A
Cl–, Ca2+ , K+ , S2–
B
S2–, Cl–, Ca2+ , K+
C
Ca2+ , K+ , Cl– , S2–
D
K+, S2–, Ca2+, Cl–
3
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Outer electronic configuration of Gd (Atomic no : 64) is -
A
4f85d06s2
B
4f45d46s2
C
4f75d16s2
D
4f35d56s2
4
AIEEE 2011
MCQ (Single Correct Answer)
+4
-1
Which one of the following order represents the correct sequence of the increasing basic nature of the given oxides ?
A
MgO < K2O < Al2O3 < Na2O
B
Al2O3 < MgO < Na2O < K2O
C
Na2O < K2O < MgO < Al2O3
D
K2O < Na2O < Al2O3 < MgO
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