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Lecture 3 : Close packing in three dimensions ; Deriving Formula Of A Compound ; Packing efficiency

  • Chapter -1 The Solid State Assignments 1

    What is F centre?

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  • Chapter -1 The Solid State Assignments 2

    Explain the following with suitable examples:

    (i) Ferromagnetism

    (ii)Paramagnetism

    (iii)Ferrimagnetism

    (iv)Antiferromagnetism

    (v)12-16 and 13-15 group compounds.

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  • Chapter -1 The Solid State Assignments 3

    Explain the following terms with suitable examples:

    (i) Schottky defect

    (ii) Frenkel defect

    (iii) Interstitials and

    (iv) F-centres

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  • Chapter -1 The Solid State Assignments 4

     

    Calculate the efficiency of packing in case of a metal crystal for

    (i) simple cubic

    (ii) body-centred cubic

    (iii) face-centred cubic (with the assumptions that atoms are touching each other).

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  • Chapter -1 The Solid State Assignments 5

     

    Explain

    (i) The basis of similarities and differences between metallic and ionic crystals.

    (ii) Ionic solids are hard and brittle.

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  • Chapter -1 The Solid State Assignments 6

     

    How many lattice points are there in one unit cell of each of the following lattice?

    (i) Face-centred cubic

    (ii) Face-centred tetragonal

    (iii) Body-centred

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  • Chapter -1 The Solid State Assignments 7

     

    How will you distinguish between the following pairs of terms:

    (i) Hexagonal close-packing and cubic close-packing?

    (ii) Crystal lattice and unit cell?

    (iii) Tetrahedral void and octahedral void?

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  • Chapter -1 The Solid State Assignments 8

     

    (i) What is meant by the term 'coordination number'?

    (ii) What is the coordination number of atoms:

    (a) in a cubic close-packed structure?

    (b) in a body-centred cubic structure?

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  • Chapter -1 The Solid State Assignments 9

    Classify each of the following solids as ionic, metallic, molecular, network (covalent) or amorphous.

    (i) Tetra phosphorus decoxide (P4O10) (vii) Graphite

    (ii) Ammonium phosphate (NH4)3PO4 (viii) Brass

    (iii) SiC (ix) Rb

    (iv) I2 (x) LiBr

    (v) P4 (xi) Si

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  • Chapter -1 The Solid State Assignments 10

    Which of the following lattices has the highest packing efficiency (i) simple cubic (ii) body-centred cubic and (iii) hexagonal close-packed lattice?

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  • Chapter -1 The Solid State Assignments 11

    What is the two dimensional coordination number of a molecule in square close packed layer?

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  • Chapter -1 The Solid State Assignments 12

    Distinguish between

    (i)Hexagonal and monoclinic unit cells

    (ii) Face-centred and end-centred unit cells.

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  • Chapter -1 The Solid State Assignments 13

    Name the parameters that characterize a unit cell.

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  • Chapter -1 The Solid State Assignments 14

    Why do solids have a definite volume?

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  • Chapter -1 The Solid State Assignments 15

     

    Why are solids rigid?

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    • Description:-

    Lecture 3 :
    Today, we will discuss the next three topics of this chapter, i.e; Close packing in three dimensions ; Deriving Formula Of A Compound ; Packing efficiency from    Chapter -1 The Solid State
    OBJECTIVES:
    1: Know every about solid state through these topics i.e; Close packing in three dimensions ; Deriving Formula Of A Compound ; Packing efficiency
    Important Tip:
     This lecture about Chapter -1 The Solid State is base for the further chapters. These topics help in many ways as to understand the and how we can use them. It help you in further studies also.Please go through the topic, their notes. Properly do the assignments, watch videos of the concerned topics. If you any doubt about any topic/point please submit it in the discussion section... it will be answered as soon as possible.
    After all of this... when you fell confident about the particular topic/chapter then take the quiz.

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