1
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The highest value of the calculated spin only magnetic moment (in BM) among all the transition metal complexes is :
A
5.92
B
6.93
C
3.87
D
4.90
2
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
In general, the properties that decrease and increase down a group in the periodic table, respectively, are :
A
Atomic Radius and Electronegativity
B
Electron Gain Enthalpy and Electronegativity.
C
Electronegativity and Atomic Radius.
D
Electronegativity and Electron Gain Enthalpy.
3
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in + 1 and + 3 oxidation states. This is due to :
A
inert pair effect
B
diagonal relationship
C
lattice structure
D
lanthanoid contraction
4
JEE Main 2019 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2$$-$$ ?
A
$$Li_2^ + $$ is unstable and $$Li_2^ - $$ is stable
B
$$Li_2^ + $$ is stable and $$Li_2^ - $$ unstable
C
Both are stable
D
Both are unstable
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