question_answer

Carbon, silicon and Germanium atoms have four valence electrons each. Their valence and conduction band are separated by energy band gaps represented by (Eg)C. (Eg)Si and (Eg)Ge respectively. Which one of the following relationship is true in their case                                                  [CBSE PMT 2005]                

A)            \[{{({{E}_{g}})}_{C}}>{{({{E}_{g}})}_{Si}}\]                   

B)            \[{{({{E}_{g}})}_{C}}={{({{E}_{g}})}_{Si}}\]

C)            \[{{({{E}_{g}})}_{C}}<{{({{E}_{g}})}_{Ge}}\]                

D)            \[{{({{E}_{g}})}_{C}}<{{({{E}_{g}})}_{Si}}\]