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How will you predict the common valency ...

How will you predict the common valency of an element rom its lewis symboll? Give examples?

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CHHAYA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-WARM UP EXERCISE
  1. What are valence electrons?

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  2. What do you mean by octet rule and duplet rule? State the significance...

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  3. How will you predict the common valency of an element rom its lewis sy...

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  4. Give the lewis symbols of (i) Br (ii) N (iii) O^(2-) (iv) S^(2-)...

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  5. What do you understand by the term ionic bond? Mention the factors fav...

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  6. How is crytalline NaCl formed from constituent elements?

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  7. The elements belonging to which group(s) of the periodic table combine...

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  8. What do you mean by lattice energy of lattice enthalpy?

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  9. How will you determine the lattice energy of an ionic compound using B...

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  10. Which elements exhibit variable electrovalency and why?

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  11. State the importance of lattice enthalpy.

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  12. What do you mean by coodination number (C.N.)?

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  13. Explain why the melting and boiling points of ionic compounds are much...

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  14. Why the ionic compounds do not exhibit isomerism?

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  15. Which type of ionic compounds exhibit isomorphism?

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  16. What is solvation energy of solvation enthalpy?

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  17. What is the condition for dissolution of an ionic compound in a partic...

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  18. The ionic compounds are soluble in polar solvents but isoluble in non-...

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  19. Why do ionic compounds conduct electricity only in solution or molten ...

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  20. If r(+)//r(-) in equal to 0.53, what is the C.N. of the cation?

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