question_answer 1)

  The molecular formula of the compound formed between B and C will be : (a)\[BC\]                              (b) \[{{B}_{2}}C\]                             (c)\[B{{C}_{2}}\]                                               (d)\[B{{C}_{3}}\]

Answer:

  (d) B is a member of nitrogen group and C is a member of halogen group. B has trivalency and C has monovalency. Hence, compound formed is\[B{{C}_{3}}\].