Band theory of solids, a brief introduction - class-XII

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Question 1 of 61

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 $(E _g) _C,, (E _g) _{Si}$ and $(E _g) _{Ge}$.Which of the following statements is true?

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$(E _g) _{Si}\, <\, (E _g) _{Ge}\, <\, (E _g) _C$

$(E _g) _{C}\, <\, (E _g) _{Ge}\, >\, (E _g) _{Si}$

$(E _g) _{C}\, >\, (E _g) _{Si}\, >\, (E _g) _{Ge}$

$(E _g) _{C}\, =\, (E _g) _{Si}\, =\, (E _g) _{Ge}$

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