101)Which one of the following is caused due to “Screening effect”?
102)The number of d-block elements in the fourth period of the modem periodic table are ………….
103)Which of the following is correct while going down the group in the periodic table?
104)Which of the following elements is bigger in size compared to others?
105)The condition for the formation of ionic bond between two atoms
106)Which of the following molecules does not obey octet rule?
107)Lateral overlap of orbitals results in the formation of
108)The number of Ione pair electrons present in the valence shell of central atom of water molecule is
View Answer
A) 2
Explanation:Water molecule =
Central atom = Oxygen (O)
Oxygen electronic configuration:
Valence electrons = 6
In
:– 2 electrons are used to form 2 bonds with Hydrogen
– Remaining 4 electrons are non-bonding
So,
Number of lone pairs =
109)In which one of the following, bond angle is minimum?
110)Who proposed the ionic bond?
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