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Amongst Be, B, Mg and Al the second ioni...

Amongst Be, B, Mg and Al the second ionisation potential is maximum for-

A

B

B

Be

C

Mg

D

Al

Text Solution

Verified by Experts

The correct Answer is:
A
Electronic configuration of B (5) is `1s^(2)2s^(2)2p^(1)`. Second ionisation potential of B is the maximum because an electron has to be removed from the fully filled 2s orbital which will require high amount of energy.
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CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-ENTRANCE QUESTION BANK
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  2. Decreasing basic character of K(2)O, BaO, CaO, MgO is

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  3. Amongst Be, B, Mg and Al the second ionisation potential is maximum fo...

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  4. An element X belongs to fourth period and fifteenth group of the perio...

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  5. Which of the following atoms should have the highest 1st electron affi...

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  6. Which of the follwing order is wrong?

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  7. Which of the following orders presents correct sequence of the increas...

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  8. The increasing order of the ionic radii of the given isoelectronic spe...

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  9. The first ionisation potential of Na is 5.1 eV. The value of electron ...

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  10. Which of the given represents correct order of incrasing first ionisat...

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  11. Which one has the highest boiling point-

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  12. Ionic radii (Å) of N^(3-),O^(2-) and F^(-) are -

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  13. Which of the following atoms ha the highest first ionisation energy-

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  14. The group having isoelectronic species is-

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  15. Both lithium and magnesium displace several similar propertiess due to...

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  16. What is the value of electron-gain enthalpy of Na^(+) if IE(1) of Na=5...

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  17. In which of the following arrangements, given sequence is not accordin...

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  18. Identify the wrong statement among the following-

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  19. Reason of lanthanoid contraction is-

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  20. Be^(2+) is isoelectronic with which of the following ions?

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