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Ionic solids conduct electricity in molt...

Ionic solids conduct electricity in molten state but not in solid state . Explain .

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In ionic solids , electrical conductivity is due to the movement of ions . In solid state , ions cannot move and remain held together by strong electrostatic forces of attraction . Therefore , they behave as insulators .
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Ionic bond is defined as the electrostatic force of attraction holding the oppositely charged ions. Ionic compounds are mostly crystalline solids having high melting and boiling points, electrical conductivity in molten state, solubility in water etc., Covalent bond is defined as the force which binds atoms of same or different elements by mutual sharing of electrons in a covalent bond. Covalent compounds are solids, liquids or gases. They are low melting and boiling point compounds. They are more soluble in non polar solvents. The valence electrons not involved in fonnation of covalent bonds are called

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VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-SOLID STATE-INTEXT QUESTIONS
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  5. Give the significance of a lattice point .

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  6. Name the parameters that characterise a unit cell .

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  7. Distinguish between hexagonal and monoclinic unit cells .

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  8. Distinguish between face-centred and end-centred unit cells .

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  9. Explain how much portion of an atom located at Corner ?

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  10. Explain how much portion of an atom located at body-centre of a cubi...

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  11. What is the two dimensional coordination number of a molecule in squar...

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  12. A compound forms hexagonal close-packed structure . What is the total ...

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  13. A compound is formed by two elements M and N . The element N forms ccp...

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  14. Which of the following lattices has the highest packing efficiency ? ...

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  15. An element with molar mass 2.7 xx 10^(-2) kg mol^(-1) forms a cubic un...

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  16. What type of defect can arise when a solid is heated ? Physical proper...

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  17. What type of stoichiometric defect is shown by ZnS

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  18. What type of stoichiometric defect is shown by AgBr

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  19. Explain how vacancies are introduced in an ionic solid when a cation o...

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  20. Ionic solids , which have anionic vacancies due to metal excess defect...

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