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Statement-1: Generally, ionisation entha...

Statement-1: Generally, ionisation enthalpy increases from left to right in a period.
Statement-2: When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.

A

A is correct statement and R is wronf statement

B

A and R both are correct statements and R is correct explanation of A

C

A and R both are wrong statements

D

A is wrong statement and R is correct statement

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Assertion: (A) Generally, ionsiation enthalpy increases from left to right in a period. Reason ( R) When successive electrons are added to the orbitals in the same principle quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electrons to the nucleus.

Assertion: Generally, ionisation enthalpy than beryllium. Reason: When successive electrons are added to the orbitals in the same principle quantum level, the shiielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to the nucleus.

Statement 1: Metallic character decreases from left to right. Statement 2: Ionization enthalpy increase and electronegativity decreases.

Statement-1: Boron has a smaller first ionisation enthalpy than beryllium. Statement-2: The penetration of a 2s electron to the nucleus is more than the 2p electron hence 2p electron is more shielded by the inner core of electrons than the 2s electrons.

Statement-1 : First electron gain enthalpy is alway -ve for an element. Statement-2 : Magnitude of electron gain enthalpy irregularly increases from left to right in a period.

Statement-1: Metallic character of first group metals increases down the group with the decreasing ionisation energy. Statement-2: The loss and gain of electron(s) can be used in explaining the reducing and oxidising behaviour of the element respectively.

NARAYNA-PERIODIC TABLE -All Questions
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  2. Assertion (A): Ionisation potential of K is numerically the same as el...

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  3. Statement-1: Generally, ionisation enthalpy increases from left to rig...

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  4. Assertion: Boron has a smaller first ionisation enthalpy than berylliu...

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  5. Assertion: Electron gain enthalpy always becomes less negative as we g...

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  7. Match the following The correct match is

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  8. Match the following columns

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  9. Match the following Match correc match is

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  10. Match the following in view of diagonal relation The correct matc...

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  11. Match the atomic numbers given in column I with the block in which the...

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  12. Match the atomic numbers of the elements given in column I with the pe...

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  13. Match the list-I and List-II and select the correct answer using the c...

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  14. Ionization energies of five elements of same period in kcal/mol are gi...

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  15. Ionization energies of five elements of same period in kcal/mol are gi...

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  16. Ionization energies of five elements of same period in kcal/mol are gi...

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  17. Ionization energies of five elements of same period in kcal/mol are gi...

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  18. Which of the following is not an actinoid?

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  19. The electronic configuration of gadolinium (Atomic number 64) is

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  20. The statement that is not correct for periodic classification of eleme...

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