1
JEE Main 2019 (Online) 9th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The element having greatest difference between its first and second ionization energies, is :
A
Ba
B
Ca
C
Sc
D
K
2
JEE Main 2019 (Online) 8th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
The IUPAC symbol for the element with atomic number 119 would be :
A
uun
B
une
C
uue
D
unh
3
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The correct order of hydration enthapies of alkali metal ions is :
A
Li+ > Na+ > Cs+ > Rb+
B
Na+ > Li+ > K+ > Cs+ > Rb+
C
Na+ > Li+ > K+ > Rb+ > Cs+
D
Li+ > Na+ > K+ > Rb+ > Cs+
4
JEE Main 2019 (Online) 8th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
The size of the iso-electronic species Cl,  Ar and Ca2+ is affected by :
A
electron-electron interaction in the outer orbitals
B
Principal quantum number of valence shell
C
nuclear charge
D
azimuthal quantum number of valence shell
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