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Explain why the covalent solids have hig...

Explain why the covalent solids have high melting and boiling points.

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Explain why the covalent solids are hard.

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Explain the following : (a) Boron has high melting and boiling points.

Explain why ionic compounds possess very high melting and boiling points?

Covalent compounds possess very high melting and boiling points.

Which element is heaviest melting and boiling point metal ?

Explain the following: Covalent compounds usually have low melting and boiling points.

Why do ionic compounds possess high melting and boiling points ?

In ionic solids, the oppositely charged ions are closely packed in space and have strong electrostatic forces of attraction. These compound have high melting and boiling points and are poor conductors of electricity in the solid state. (i) Why are ionic solids poor conductros of electricity ? (ii) What happens to electrical conductivity when these are dissolved in water ?

ICSE-SOLID STATE-EXERCISE (PART-II DESCRIPTIVE QUESTIONS) (LONG ANSWER QUESTIONS)
  1. Explain why ionic solids are highly brittle.

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  2. What are atomic solids ? Discuss the structures of diamond and graphit...

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  3. Explain why the covalent solids have high melting and boiling points.

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  4. Explain why the covalent solids are hard.

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  5. Explain why the covalent solids are bad conductors of electricity.

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  6. Explain why the covalent solids are usually soluble in non-polar solve...

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  7. How will you account for the following: Diamond is extremely hard an...

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  8. How will you account for the following: Diamond is a non-conductor o...

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  9. How will you account for the following: Diamond has high density.

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  10. How will you account for the following: Graphite is soft and is used...

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  11. How will you account for the following: Graphite is a good conductor...

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  12. Mention three differences between crystalline and amorphous solids.

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  13. For diamond, state the element present at the lattice sites, the numbe...

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  14. For sodium chloride crystal, state: the type of unit cell.

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  15. For sodium chloride crystal, state: the nature of forces holding the...

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  16. For sodium chloride crystal, state: the number of nearest neighbours...

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  17. For sodium chloride crystal, state: the geometry of the sodium ions ...

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  18. Graphite is anisotropic to electrical conduction. Discuss.

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  19. Diamond is hard and a bad conductor of electricity while graphite is s...

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  20. Describe the unit cell of sodium chloride with a neat diagram stating....

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