1
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The theory that can completely/properly explain the nature of bonding in [Ni(Co)4] is :
A
Wemer's theory
B
Valence bond theory
C
Crystal field theory
D
Molecular orbital theory
2
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The atomic radius of Ag is closed to :
A
Au
B
Cu
C
Hg
D
Ni
3
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
Total number of 6-digit numbers in which only and all the five digits 1, 3, 5, 7 and 9 appear, is :
A
$${5 \over 2}\left( {6!} \right)$$
B
$${6!}$$
C
56
D
$${1 \over 2}\left( {6!} \right)$$
4
JEE Main 2020 (Online) 7th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If $${\mathop{\rm Re}\nolimits} \left( {{{z - 1} \over {2z + i}}} \right) = 1$$, where z = x + iy, then the point (x, y) lies on a :
A
straight line whose slope is $${3 \over 2}$$
B
straight line whose slope is $$-{2 \over 3}$$
C
circle whose diameter is $${{\sqrt 5 } \over 2}$$
D
circle whose centre is at $$\left( { - {1 \over 2}, - {3 \over 2}} \right)$$
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