1
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The increasing order of the atomic radii of the following elements is :-
(a) C (b) O
(c) F (d) Cl
(e) Br
A
(a) < (b) < (c) < (d) < (e)
B
(c) < (b) < (a) < (d) < (e)
C
(b) < (c) < (d) < (a) < (e)
D
(d) < (c) < (b) < (a) < (e)
2
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The third ionization enthalpy is minimum for :
A
Ni
B
Co
C
Mn
D
Fe
3
JEE Main 2020 (Online) 8th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The first ionization energy (in kJ/mol) of Na, Mg, Al and Si respectively, are :
A
496, 577, 786, 737
B
496, 737, 577, 786
C
786, 737, 577, 496
D
496, 577, 737, 786
4
JEE Main 2020 (Online) 7th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Within each pair of elements F & Cl, S & Se, and Li & Na, respectively, the elements that release more energy upon and electron gain are :
A
F, S and Li
B
Cl, Se and Na
C
Cl, S and Li
D
F, Se and Na
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