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In which one of the following pairs the ...

In which one of the following pairs the radius of the second species is greater than that of first ?

A

`O^(-2),N^(-3)`

B

`Na,Mg`

C

`Al,Be`

D

`Li^(+),Be^(+2)`

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The correct Answer is:
A
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ALLEN-Periodic Table -All Questions
  1. If Z("eff") of sodium is .x. then Z("eff") of calcium is :-

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  2. Lanthanoid contraction will not have any influence when we compare siz...

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  3. In which one of the following pairs the radius of the second species i...

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  4. Which of the following species will have the largest and the smallest ...

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  5. In which pair the first atom or ion is not larger than the second :-

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  6. Which one of the following statements is incorrect

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  7. Which of the following properties among halogens decreases from fluori...

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  8. Which of the following statement is incorrect ?

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  9. The correct values of ionization enthalpies (in kJ mol^(-1)) of Si, P,...

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  10. The second ionization energy is maximum for:

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  11. From the ground state electronic configurartion of the elements given ...

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  12. An elements have successive ionization enthalpies as 940 (first), 2080...

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  13. The incorrect statement among the following is

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  14. Ionisation energy depends upon:

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  15. The first ionization enthalpy (Delta(i)H) values of the third period e...

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  16. Which one of the following statements is incorrect in relation to ioni...

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  17. The IE1, IE2, IE3, IE4 and IE5 of an element are 7.1, 14.3, 34.5, 46....

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  18. Which of the following processes requires maximum energy

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  19. To which of the following atom, the attachment of electron is most dif...

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  20. The element having very high ionization enthalpy but zero electron aff...

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