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Which one of the following groups repres...

Which one of the following groups represent a collection of isolectronic species ? (At.no `Cs = 55, Br = 35)`

A

`Na^(+),Ca^(2+),Mg^(2+)`

B

`N^(3-),F^(-),Na^(+)`

C

`Be,Al^(3+),Cl^(-)`

D

`Ca^(2+),Cs^(+),Br`

Text Solution

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The correct Answer is:
B
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NCERT FINGERTIPS-CLASSIFICATION OF ELEMENTS AND PERIODICITY -Periodic Trends In Properties Of Elements
  1. Ionic radius a group while moving down

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  2. K^(+) and Cl^(-) ions are isoelectronic.Which of the statement is not ...

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  3. Which one of the following groups represent a collection of isolectron...

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  4. Which of the following transitions involves maximum amount of energy?

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  5. What is the order of successive ionisation enthalpies?

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  6. Which group of elements shows lowest ionisation enthalpy?

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  7. The first ionisation enthalpy of the elements C,N,P,Si are in the orde...

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  8. The ionisation energy of nitrogen is more than that of oxygen because

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  9. which of the following elements has the highest value of second ioniza...

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  10. Which of the following can most easily form unipositive gaseous ion?

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  11. Amongst the metal Be, Mg, Ca and Sr of group 2 of the periodic table, ...

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  12. Beryllium has higher ionisation enthalpy than boron.This can be explai...

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  13. A sudden large jump between the values of second and third ionisation ...

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  14. Few elements are matched with their successive ionisation energies,Ide...

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  15. First and second ionisation enthalpies(in KJ/mol) of few elements are ...

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  16. Ionization enthalpies of transition metals are

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  17. Consider these electronic configurations for neutral atoms: (i) 1s^(...

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  18. Which of the following element will have highest ionization energy?

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  19. Few values of enthalpies are given below: O=-141 KJ mol^(-1) F= -328 K...

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  20. In the given graph,a periodic property (R) is plotted against atomic n...

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