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Variable valency is characteristic of...

Variable valency is characteristic of

A

halogen

B

transition elements

C

alkali metals

D

noble gas

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The correct Answer is:
B
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DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
  1. Which one of the following is correct order of the size?

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  2. According to Fajans'rules, the percentage of covalent character in an ...

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  3. Variable valency is characteristic of

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  4. Which of the following has least electron affinity?

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  5. In the modern long form of the periodic table, elements are arranged i...

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  6. An element of atomic number 29 belongs to which of the following block...

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  7. The ionisation potential is lowest for the

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  8. The element with highest electron affinity among the halogens is

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  9. Which of the following sets of atomic numbers belongs to that of alkal...

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  10. Which of the following statement about fluorine is not correct?

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  11. lonisation energy is highest in

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  12. The atomic radius increases as we move down a group because

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  13. Which one of the following pairs of atomic numbers, represents element...

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  14. Consider the following changes A to A^(+) + e^- , E1 and A^+ to A^(2+)...

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  15. The isoelectronic ion having lowest ionisation energy is

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  16. The decreasing order of the ionization potential of the following elem...

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  17. Which of the following does not exhibit the periodicity in properties ...

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  18. Which one of the following is an incorrect statement?

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  19. The electronic configuration of element A, B, and C are [He]2s^(1),[Ne...

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  20. Which among the following species has the highest ionisation energy ?

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