1
JEE Main 2022 (Online) 24th June Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Metals generally melt at very high temperature. Amongst the following, the metal with the highest melting point will be :

A
Hg
B
Ag
C
Ga
D
Cs
2
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
In the given chemical reaction, colors of the Fe2+ and Fe3+ ions, are respectively :

5Fe2+ + MnO$$_4^ - $$ + 8H+ $$\to$$ Mn2+ + 4H2O + 5Fe3+
A
Yellow, Orange
B
Yellow, Green
C
Green, Orange
D
Green, Yellow
3
JEE Main 2021 (Online) 1st September Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d5 :
A
Ru
B
Mn
C
Co
D
Fe
4
JEE Main 2021 (Online) 31st August Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language
The Eu2+ ion is a strong reducing agent in spite of its ground state electronic configuration (outermost) : [Atomic number of Eu = 63]
A
4f76s2
B
4f6
C
4f7
D
4f66s2
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