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Question

Pick out the correct element from the following: 

(i) C                       (ii) Si                     (iii) Pb                 (iv) Ge


  1. (i) and (ii)

  2. (ii) and (iv)

  3. (ii) and (iii)

  4. (i) and (iv)


Solution

The correct option is B

(ii) and (iv)


Carbon group is sometimes also referred to as tetragens because it has four electrons in its outermost shell or the valence shell. This group is also called the crystallogens. Silicon and germanium are crystallogens and are also used as a semi-conductor. 

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