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The closest-packing sequence ABAB..........

The closest-packing sequence ABAB....... represents 

A

Primitive cubic packing

B

body - centred cubic packing

C

face - centred cubic packing

D

hexagonal packing

Text Solution

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The correct Answer is:
B, D
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Knowledge Check

  • Which of the following sequences correctly represents the series of events that take place during sexual reproduction?

    A
    Gametogenesis- Gamete transfer-Fertilisation - Zygote formation - Embryogenesis
    B
    Gamete transfer- Fertilisation - Gametogenesis- Zygote formation- Embryogenesis
    C
    Fertilisation - Zygote formation - Gamete transfer - Gametogenesis - Embryogenesis
    D
    Zygote formation- Gametetransfer- Embryogenesis- Fertilisation - Gametogenesis

  • Find out the correct sequence of organisms represents increasing order of chromosomes found in their respective meiocytes

    A
    Maize `rarr` Frutify `rarr` Rice `rarr` Apple
    B
    Frutifly `rarr` Housefly `rarr` Maize `rarr` Rice
    C
    Potato `rarr` Apple `rarr` Dog `rarr` Cat
    D
    House fly `rarr` Apple `rarr` Onlion `rarr` Dog

  • A metallic element crystallises into a lattice containing a sequence of layers of ABABAB... Any packing of spheres leaves out voids in the lattice. Volume percentage of empty space is

    A
    `52%`
    B
    `26%`
    C
    `50%`
    D
    `74%`

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    Match the following : {:("COLUMN - I","COLUMN - II"),("A) ABAB ...........(closed)","p) C • N = 8"),("B) AAA.......","q) 4 spheres permit cell"),("C) ABCABC......","r) 74% packing efficiency"),("D) ABABAB ......(less effective)","s) C • N = 6"):}

    Match the following closest packing of identical spheres listed in Column-I with the characteristics listed in Column-II. COLUMN - I {:("COLUMN - I","COLUMN - II"),("A) AAAA packing","p) CCP, CN = 12"),("B) ABAB packing","q) HCP, CN = 12"),("C) ABCABC packing","r) BCC, CN = 8"),("D) Square close packing","s) Primitive cubic, CN = 6"):}

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