MCQ
Finely divided iron combines with $CO $ to give
- ✓$Fe{(CO)_5}$
- B$F{e_2}{(CO)_9}$
- C$F{e_2}{(CO)_{12}}$
- D$Fe{(CO)_6}$
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(I) Toluene
(II) $m - $dichlorobenzene
(III) $o - $dichlorobenzene
(IV)$p - $dichlorobenzene
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Hybridisation of carbon $a, b$ and $c$ respectively are :


Arrange the following in increasing order of their covalent character.
_x000D_ _x000D_$CaF _{2}$,$CaCl _{2}$,$CaBr _{2}$,$CaI _{2}$
_x000D_ _x000D_Choose the correct answer from the options given below.