Explain the following:
a)
PC15 is known but NClg is not known.
b)
H20 is liquid but H2S is gas.
answer plz
Answers
PCl
5
forms five bonds by using the d-orbitals to "expand the octet" and have more places to put bonding pairs of electrons.NCl
5
does not exist because there are no d-orbitals in the second energy level. Therefore there is no way to arrange five pairs of bonding electrons around a nitrogen atom.
H2O is liquid because of its ability to form hydrogen bonds which is possible only in case of F , O and N because of their high electronegativity. While in case of H2S there is no hydrogen bond formation . Hence H20 is liquid while H2S is gas .
Answer:
In H
2
O there is hydrogen bonding because oxygen has a high electronegativity.
So, the hydrogen atoms from other molecules of water form a hydrogen bonds with oxygen resulting in intermolecular hydrogen bonding.
Therefore at room temperature, H
2
O is a liquid and H
2
S is a gas.
Explanation: