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Question

Carbon, silicon and germanium have four valence electrons each. These are characterised by valence and conduction bands separated by energy band gap respectively equal to (Eg)C,(Eg)Si and (Eg)Ge.Which of the following statements is true?
  1. (Eg)C<(Eg)Ge>(Eg)Si
  2. (Eg)Si<(Eg)Ge<(Eg)C
  3. (Eg)C>(Eg)Si>(Eg)Ge
  4. (Eg)C=(Eg)Si=(Eg)Ge

A
(Eg)Si<(Eg)Ge<(Eg)C
B
(Eg)C<(Eg)Ge>(Eg)Si
C
(Eg)C>(Eg)Si>(Eg)Ge
D
(Eg)C=(Eg)Si=(Eg)Ge
Solution
Verified by Toppr

The correct option is C (Eg)C>(Eg)Si>(Eg)Ge
For given elements, the energy band gap of carbon is the maximum and of germanium is the least.
Hence option C is correct.

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