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C, Si and Ge have same lattice structure...

C, Si and Ge have same lattice structure. Why is C insulator,
while Si and Ge intrinsic semiconductors ?

Text Solution

Verified by Experts

In carbon the four bonding electrons are d present in second orbit . However in casae of Si and and Ge , these four bonding highest for C and free electrons in case of C are neglightly availble for conduction.
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Knowledge Check

  • C and Si have

    A
    Same physical properties
    B
    Different physical properties
    C
    Same pyhsical but different chemical properties
    D
    Different chemical and physical properties

  • Assertion (A) : C,Si and Ge have 4 Valancy each both but C is an insulator where as Si and Ge are semi conductors Reason ( R) : Energy gap is least for Ge , less for Si compared to C , So that free electrons for conduction in Ge and Si are significant but negligible small for C .

    A
    `A,R` are true and `R` explains `A` correctly
    B
    `A,R` are true and `R` do not explain `A` correctly
    C
    `A` is true, but `R` is false
    D
    `R` is true, but `A` is false

  • C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator whereas Si is intrinsic semiconductor. This is because

    A
    The four bonding electrons in the case of `C` lie in the thirtd orbit, whereas for `Si` they lie in the fourth orbit
    B
    In case of `C` the valence band is not completely filled at absolute zero temperature
    C
    In case of `C` the conduction band is partly filled even at absolute zero temperature
    D
    The four bonding electrons in the case of `C` lie in the second orbit, whereas in the case of `Si` they lie in the third orbit

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    The lattice structure for both carbon and silicon is same with each of them having 4 bonding electrons c is an insulator wheres Si is semiconductor why

    C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator whereas Si is intrinsic semiconductor. This is because

    C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator whereas Si is intrinsic semiconductor. This is because

    Three elements B, Si and Ge are

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