1
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The INCORRECT statement is :
A
the color of [CoCl(NH3)5]2+ is violet as it absorbs the yellow light.
B
the gemstone, ruby, has Cr3+ ions occupying the octahedral sites of beryl.
C
the spin-only magnetic moment of [Ni(NH3)4(H2O)2]2+ is 2.83 BM.
D
the spin-only magnetic moments of [Fe(H2O)6]2+ and [Cr(H2O)6]2+ are nearly similar.
2
JEE Main 2019 (Online) 10th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct order of the first ionization enthalpies is :
A
Ti < Mn < Zn < Ni
B
Zn < Ni < Mn < Ti
C
Mn < Ti < Zn < Ni
D
Ti < Mn < Ni < Zn
3
JEE Main 2019 (Online) 10th April Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Consider the hydrated ions of Ti2+, V2+, Ti3+, and Sc3+. The correct order of their spin-only magnetic moments is :
A
Sc3+ < Ti3+ < V2+ < Ti2+
B
Sc3+ < Ti3+ < Ti2+ < V2+
C
Ti3+ < Ti2+ < Sc3+ < V2+
D
V2+ < Ti2+ < Ti3+ < Sc3+
4
JEE Main 2019 (Online) 9th April Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The maximum number of possible oxidation states of actinoides are shown by :
A
nobelium (No) and lawrencium (Lr)
B
actinium (Ac) and thorium (Th)
C
neptunium (Np) and plutonium (Pu)
D
berkelium (Bk) and californium (Cf)
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