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(A) : Crystalline solids have sharp and ...

(A) : Crystalline solids have sharp and chara cteric melting points.
(R) : Crystalline solids have definite heat of fusion.

A

Both (A) and (R) are true. (R) properly explain (A)

B

Both (A) and (R) are true. (R) does not explain (A)

C

(A) is true. (R) is false

D

(A) is false. (R) is true

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AAKASH SERIES-SOLIDS STATE-OBJECTIVE EXERCISE - 1 (TYPES OF SOLIDS OF CRYSTAL STRUCTURES)
  1. Which of the following is not a correct statement ?

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  2. {:("Column A","Column B"),("A) Glass","1) Framework silica"),("B) Quar...

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  3. (A) : Crystalline solids have sharp and chara cteric melting points. ...

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  4. The maximum displacement perpendicular to the motion of the wave is kn...

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  5. By passing X-rays through copper sulphate crystals diffraction band is...

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  6. The structural unit of a crystal is called

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  7. (A): Glass possess sharp melting point. (R) : Glass is a pseudo soli...

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  8. The angle corresponding to maximum diffra ction of x-rays on solid cry...

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  9. Number of space lattices presnt in triclinic System

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  10. Graphically the total number of fundamental spatial arrangements possi...

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  11. In case of a cubic system, the number of types of space lattices

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  12. The number of points at the centre of the primitive unit cell is

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  13. How many kinds of primitive unit cells are possible

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  14. {:("(Unitcell)","(no of atoms per unitcell)"),("A) Simple cube","1) 4"...

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  15. The number of space lattices possible for the crystalographic dimensio...

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  16. In which of the following crystal systems F.C.C unit cells exists ?

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  17. Out of seven crystal systems how many have body centred unit cell ?

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  18. How many unit cells are possible for the crystallographic dimensions a...

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  19. Which of the following systems is not correctly characterised ?

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  20. Axial distances are a = bne c and axial angles are a = 90^(0) = beta, ...

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