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1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The acidic, basic and amphoteric oxides, respectively, are :
A
Cl2O, CaO, P4O10
B
N2O3, Li2O, Al2O3
C
MgO, Cl2O, Al2O3
D
Na2O, SO3, Al2O3
2
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)
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) 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
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