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Across the period , Ionisation energy...

Across the period , Ionisation energy _________

A

increases

B

decreases

C

does not very

D

First decreases and then increases

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The correct Answer is:
a
Across the period , Ionisation energy is increases and down the group , Ionisation energy is and down the group ,Ionisation energy is decreases.
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SURA PUBLICATION-PERIODIC CLASSIFICATION OF ELEMENTS-ADDITIONAL CHOOSE THE CORRECT ANSWER
  1. The correct order of size among Br^(+), Br, Br^(-)

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  2. The elements having highest ionization energies within their periods a...

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  3. Across the period , Ionisation energy

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  4. Statements I : Ionisation energy of fluorine is greater than oxygen. ...

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  5. Which of the following statements are correct? (i) Helium has the ...

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  6. Which of the following factor decreases across the period ?

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  7. Ionisation enthalpy is an process

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  8. The effective nuclear charge across the period (from left to right)

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  9. Which of the following N^(3-),O^(2-),F^(-) is largest in size?

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  10. The radii of F, F^(-) , O andO^(2-) are in the order

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  11. Which of the following atom has the lowest ionization enthalpy?

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  12. Which of the following has the highest positive electron gain enthalpy...

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  13. Which of the following statements is incorrect ?

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  14. Correct order of 1st ionization potential among elements Be,B,C,N,O is

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  15. The most electronegative element of the periodic table is

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  16. Assertion (A) : The first ionization energy of Al is lower than Mg. ...

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  17. Ionic radii are

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  18. Which of the following sets contain only isoelectionic ions?

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  19. With repect to chlorine ,hydrogen will be

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  20. Which orbital diagram gives an insight to the highest ionization ene...

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