Correct order of 1st ionisation potential (IP) among following elements Be, B, C, N, O is
- B < Be < C < O < N
- B < Be < C < N < 0
- Be < B < C < N < O
- Be < B < C < O < N
The Correct Option is A
Solution and Explanation
half-filled or completely filled' orbitals are more stable than partially filled orbitals.
In a period from left to right ionisation potential decreases as the atomic number increases. The given elements (Be, B, C, N, O) are present in II period as
$\xrightarrow{\begin {array}
\ Be \ \ \ \ \ \ \ \ B \ \\
\ Ionisation
\end {array} \begin {array}
\ \ \ C \ \ \ \ \ N \ \ \ \ \ O \\
\ \ potential \ \ increases \\
\end {array} }$
But in case of Be and B, Be has higher ionisation potential due to stable configuration
So, the correct order of increasing ionisation potential will be
B < Be < C < 0 < N
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Concepts Used:
Haloalkanes and Haloarenes - Classification
Classification of Haloalkanes and Haloarenes are as follows:
Haloalkanes and Haloarenes are Classified on the Basis of the Number of Halogen Atoms:
These are further classified as mono, di, or polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures. For example;
- Monohaloalkane
- Dihaloalkane
- Trihaloalkane
Haloalkanes and Haloarenes are Classified on Compounds Containing sp3 C—X Bond (X= F, Cl, Br, I)
This class includes:
- Alkyl halides or haloalkanes (R—X)
- Allylic halides
- Benzylic halides
Haloalkanes and Haloarenes are Classified on Compounds Containing sp2 C—X Bond
This class includes:
- Vinylic halides
- Aryl halides