00:01
Hi, in these questions we need to choose the correct option.
00:05
Firstly, we need to determine which of these is given ions is the diamagnetic.
00:13
A diamagnetic element is the one which has no unpaired electron in it all the electrons are paired.
00:35
We will write the electronic configuration for ease.
00:39
First is copper 2 positive ion.
00:46
In 3d orbital it contains one unpaired electron.
00:56
In selenium, it contains all paired electrons.
01:16
Therefore, it is diamagnetic in nature, hence selenium 4 positive is correct.
01:30
The next we have to determine which of these pairs is.
01:35
Is paramagnetic.
01:36
For paramagnetic, the electron must be unpaired...