Question:
The first ionisation potential (in eV) of Be and B, respectively are
The first ionisation potential (in eV) of Be and B, respectively are
Updated On: Aug 1, 2024
- 8.29, 9.32
- 9.32, 9.32
- 8.29, 8.29
- 9.32, 8.29
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
First ionisation potential of Be is greater than
boron due to stable configuration
$ \, \, \, \, \, \, \, \, \, \, _4 Be =1s^2 , 2s^2$
$ \, \, \, \, \, \, \, \, \, \, _5 B=1s^2,2s^2 2p^1$
Order of attraction of electrons towards nucleus is 2s >2p, so more amount of energy is required to remove the electron from 2 s orbital in comparison to 2p orbital. So, ionisation potential of Be is 9.32 eV and B is 8.29 eV
boron due to stable configuration
$ \, \, \, \, \, \, \, \, \, \, _4 Be =1s^2 , 2s^2$
$ \, \, \, \, \, \, \, \, \, \, _5 B=1s^2,2s^2 2p^1$
Order of attraction of electrons towards nucleus is 2s >2p, so more amount of energy is required to remove the electron from 2 s orbital in comparison to 2p orbital. So, ionisation potential of Be is 9.32 eV and B is 8.29 eV
Was this answer helpful?
0
0
Top Questions on Classification of elements and periodicity in properties
- Which of the following elements does not have a completely filled outermost shell in its ground state?
- MHT CET - 2025
- Chemistry
- Classification of elements and periodicity in properties
- Electronegativity of chlorine is less than oxygen because:
- MHT CET - 2025
- Chemistry
- Classification of elements and periodicity in properties
- Which of the following is the correct decreasing order of electronegativity?
- MHT CET - 2025
- Chemistry
- Classification of elements and periodicity in properties
- Which of the following is the correct order of increasing atomic size?
- MHT CET - 2025
- Chemistry
- Classification of elements and periodicity in properties
- Atomic number of element with lowest first ionisation enthalpy is
- JEE Main - 2025
- Chemistry
- Classification of elements and periodicity in properties
View More Questions
Questions Asked in NEET exam
- The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60° at the centre. The magnetic moment of this arc section is
- NEET (UG) - 2024
- Magnetic moment
Identify the major product C formed in the following reaction sequence:
- NEET (UG) - 2024
- Chemical Reactions
- Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from 0 to VI.
A) Al3+
B) Cu2+
C) Ba2+
D) Co2+
E) Mg2+
Choose the correct answer from the options given below- NEET (UG) - 2024
- Modern Periodic Law And The Present Form Of The Periodic Table
- The work done during reversible isothermal expansion of one mole of hydrogen gas at 25oC from a pressure of 20 atm to 10 atm is:
(Given R = 2.0 cal K-1 mol-1)- NEET (UG) - 2024
- Gas laws
- Consider the following reaction in a sealed vessel at equilibrium with concentrations of
N2 = 3.0 × 10–3 M, O2 = 4.2 × 10–3 M and NO = 2.8 × 10–3 M.
2NO(g)⇋N2(g) + O2(g)
If 0.1 mol L–1 of NO(g) is taken in a closed vessel, what will be degree of dissociation (a) of NO(g) at equilibrium?- NEET (UG) - 2024
- Equilibrium
View More Questions
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