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A very hard crystalline solid that melts...

A very hard crystalline solid that melts at very high temperature, cannot conduct electricity either in solid state or in molten state. What kind of crystalline solid is this? What type of constituent particles does this solid consist of? What is the nature of forces that holds the particles in this solids?

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CHHAYA PUBLICATION-SOLID STATE-WARM UP EXERCISE
  1. Why are the lower parts of the glass panes in the windows of very old ...

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  2. Classify the following substances as molecular, covalent, or ionic cry...

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  3. A very hard crystalline solid that melts at very high temperature, can...

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  4. Define the terms (a) crystal (b) crystal lattice ( c) lattice point.

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  5. What is unit cell of a crystal lattice? What parameters are used to ch...

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  6. Define (a) simple or primitive unit cell (b) body-centred unit cell ( ...

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  7. Which type of unit cells are called non-primitive unit cells?

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  8. How many types of two-dimensional lattices are possible?

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  9. How many types of crystal systems are there? Name them.

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  10. How many Bravais lattice are there? How many of these do belong to the...

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  11. Which crystal systems have the following axial characteristics? (i) a ...

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  12. Which crystal system has all possible types of unit cells, i.e., primi...

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  13. Name a compound and an element whose crystals consist of cubic unit ce...

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  14. Name a compound and an element whose crystals consist of hexagonal uni...

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  15. Calculate the number of particles per unit cell of three possible cubi...

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  16. Calculate the number of particles per unit cell of the following two-d...

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  17. The given figure represents the unit cell of a solid with a cubic crys...

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  18. Molar mass of an element is Mg*mol^(-1). The element crystallises in a...

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  19. A metal (molar mass = 108 g*mol^(-1)) crystallises in a cubic structur...

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  20. A cubic unit cell contains one atom at each of its corner and two atom...

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