Answer : Option DExplaination / Solution:
The maximum oxidation state shown by a p-block element is equal to
the total number of valence electrons (i.e., the sum of the s and
p-electrons).
P:[Ne]3s23p3.
Total valence electrons =5 so it will show +5 oxidation state. The
stability of +5 oxidation state decreases down the group due to inert
pair effect.
Answer : Option CExplaination / Solution:
N has maximum covalency of 4 since only four (one s and three p) orbitals are available for bonding. d orbitals are not available for bonding.
Answer : Option DExplaination / Solution:
As we move down the group in periodic table , metallic character increases so Bi is a metal thus its oxide is basic.
Q8.Ammonia has a higher boiling point and is less volatile because of
Answer : Option BExplaination / Solution:
In the solid and liquid states NH3
is associated through intermolecular hydrogen bonding and therefore it
has higher boiling point and less volatile compared to other hydrides
of group 15.
Q9.Which compound is used in the preparation of caprolactam?
Answer : Option CExplaination / Solution: NH3 is used in preparation of caprolactum. Caprolactam is an organic compound with the formula (CH2)5C(O)NH. It is used to make Nylon 6 fiber and plastics.