1
JEE Main 2021 (Online) 24th February Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
A
Al < Mg < Si < S < P
B
Al < Mg < S < Si < P
C
Mg < Al < Si < S < P
D
Mg < Al < Si < P < S
2
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct order of the ionic radii of
O2–, N3–, F , Mg2+, Na+ and Al3+ is :
A
N3– < O2– < F < Na+ < Mg2+ < Al3+
B
N3– < F < O2– < Mg2+ < Na+ < Al3+
C
Al3+ < Na+ < Mg2+ < O2– < F < N3–
D
Al3+ < Mg2+ < Na+ < F < O2– < N3–
3
JEE Main 2020 (Online) 4th September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The ionic radii of O2–, F, Na+ and Mg2+ are in the order :
A
F > O2– > Na+ > Mg2+
B
Mg2+ > Na+ > F > O2–
C
O2– > F > Mg2+ > Na+
D
O2– > F > Na+ > Mg2+
4
JEE Main 2020 (Online) 3rd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Among the statements (I – IV), the correct ones are:
(I) Be has smaller atomic radius compared to Mg.
(II) Be has higher ionization enthalpy than Al.
(III) Charge/radius ratio of Be is greater than that of Al.
(IV) Both Be and Al form mainly covalent compounds.
A
(I), (II) and (IV)
B
(II), (III) and (IV)
C
(I), (III) and (IV)
D
(I), (II) and (III)
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