Carbon, silicon and germanium have four valence electrons each. These are characterisedby 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?

Carbon, silicon and germanium have four valence electrons each. These

1.	Carbon, silicon and germanium have four valence electrons each. These are characterisedby 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?
Answer» `(E_(g))_(Si) lt (E_(g))_(Ge) lt (E_(g))_(C )` `(E_(g))_(C) lt (E_(g))_(Ge) lt (E_(g))_(Si )` `(E_(g))_(C) gt (E_(g))_(Si) gt (E_(g))_(Ge )` `(E_(g))_(C) = (E_(g))_(Si) = (E_(g))_(Ge )` Solution :`(E_(g))_(C) gt (E_(g))_(Si) gt (E_(g))_(Ge )` Among the given ELEMENTS the band gap ofSi and Ge is 5.4 eV, 1.1 eV and 0.7 eV respectively. Hence, OPTION (c ) is CORRECT.

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Carbon, silicon and germanium have four valence electrons each. These are characterisedby 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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