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The law of triad is applicable to :...

The law of triad is applicable to :

A

Chlorine, bromine and iodine

B

Hydrogen, oxygen and nitrogen

C

Sodium, neon and calcium

D

All of the above

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NCERT TAMIL-PERIODIC CLASSIFICATION-I-Questions (Choose the Best Answer)
  1. All the elements in a group in the periodic table have the same

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

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  3. The law of triad is applicable to :

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  4. The law of octaves was stated by :

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

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

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  7. Which of the following hydroxide is most basic ?

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

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

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  10. Which of the following is the lightest metal ?

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

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  12. With respect to chlorine, hydrogen will be

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

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  14. Halogens belong to the :

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

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

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  17. The first attempt to classify the elements was made by :

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  18. Characteristic of transition elements is incomplete

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  19. Which of the following will have lowest first ionization enthalpy ?

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  20. Which of the following salt is more soluble?

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