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Which of the following forms stable gase...

Which of the following forms stable gaseous negative ion

A

F

B

Cl

C

Br

D

I

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NCERT TAMIL-PERIODIC CLASSIFICATION-I-Questions (Choose the Best Answer)
  1. Representative elements are those which belong to :

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  2. The most electronegative element of the periodic table is

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  3. Which of the following forms stable gaseous negative ion

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

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  5. All the elements in a group in the periodic table have the same

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  6. Elements whose atoms have their s and p-sub-levels complete are the:

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  7. The law of triad is applicable to :

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  8. The law of octaves was stated by :

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  9. Which of the following property decreases down a group :

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  10. Which of the following has the lowest melting point ? CsCl RbCl KCl N...

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  11. Which of the following hydroxide is most basic ?

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  12. Excluding hydrogen and helium , the smallest element in the periodic t...

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  13. Which one among the following species has the largest atomic radius ?

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  14. Which of the following is the lightest metal ?

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  15. Which element of the following has the highest ionisation potential? ...

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  16. With respect to chlorine, hydrogen will be

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  17. Which element has the greatest tendency to lose electrons?

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  18. Halogens belong to the :

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  19. Compared to first ionization enthalpy of an atom, the second is :

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  20. Which of the following combinations is in order of increasing resistan...

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