question_answer 1)

  Match the ions given in Column I with their nature given in Column II.

Column I	Column II
(i) \[C{{H}_{3}}-\underset{\centerdot \centerdot }{\overset{\centerdot \centerdot }{\mathop{O}}}\,-\overset{\oplus }{\mathop{CH}}\,-C{{H}_{3}}\]	(a) Stable due to resonance
(ii) \[{{F}_{3}}-{{C}^{\oplus }}\]	(b) Destabilised due to inductive effect
(iii) \[C{{H}_{3}}-\underset{\underset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\overset{\overset{\text{C}{{\text{H}}_{\text{3}}}}{\mathop{\text{ }\!\!|\!\!\text{ }}}\,}{\mathop{{{C}^{O-}}}}}\,\]	(c) Stabilised by hyper conjugation
(iv) \[C{{H}_{3}}-\overset{\oplus }{\mathop{C}}\,H-C{{H}_{3}}\]	(d) A secondary carbocation

Answer:

  \[(i-a,b,d),(ii-b),(iii-b),(iv-c,d)\]