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Define the term 'amorphous'. Give a few ...

Define the term 'amorphous'. Give a few examples of amorphous solids.

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Solids in which the constituent particles have a short range order are called amorphous solids. Such solids have irregular shape and are isotropic i.e., they show same property in all directions. They do not give a clean cleavage. Such solids also do not show sharp melting points. Glass, rubber and plastics are examples of amorphous solids.
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U-LIKE SERIES-SOLID STATE-NCERT TEXTBOOK EXERCISES
  1. Define the term 'amorphous'. Give a few examples of amorphous solids.

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  2. What makes a glass different from a solid such as quartz ? Under what ...

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  3. Classify each of the following solids as ionic, metallic, molecular, n...

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  4. (i) What is meant by the term 'coordination number ? (ii) What is th...

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  5. How can you determine the atomic mass of an unknown metal if you know ...

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  6. "Stability of a crystal is reflected in the magnitude of its melting p...

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  7. How will you distinguish between the following pairs of terms : (i) ...

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  8. How many lattice points are there in one unit cell of each of the foll...

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  9. Explain (i) The basis of similarities and differences between metall...

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  10. Calculate the efficiency of packing in case of a metal crystal for (...

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  11. Silver crystallises in fcc lattice. If edge length of the cell is 4.07...

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  12. A cubic solid is made of two elements P and Q. Atoms of Q are at the c...

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  13. Niobium crystallises in body-centred cubic structure. If density is 8....

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  14. If the radius of the octahedral void is r and radius of the atoms in c...

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  15. Copper crystallises into a fcc lattice with edge length 3.61 xx 10^(-8...

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  16. Analysis shows that nickel oxide has the formula Nio(0.98)O(1.00). Wha...

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  17. What is a semiconductor ? Describe the two main types of semiconductor...

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  18. Non-stoichiometric cuprous oxide, Cu(2)O can be prepared in laboratory...

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  19. Ferric oxide crystallises in a hexagonal close-packed array of oxide i...

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  20. Classify each of the following as being either a p-type or a n-type se...

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