MCQ
The formula of ferrocene is
  • A
    ${\left[ {Fe{{(CN)}_6}} \right]^{4 - }}$
  • B
    ${\left[ {Fe{{(CN)}_6}} \right]^{3 - }}$
  • C
    $\left[ {Fe{{(CO)}_5}} \right]$
  • $\left[ {{{\left( {{C_5}{H_5}} \right)}_2}Fe} \right]$

Answer

Correct option: D.
$\left[ {{{\left( {{C_5}{H_5}} \right)}_2}Fe} \right]$
d
It’s obvious.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

$\begin{array}{*{20}{c}}
  {{{(C{H_3})}_2}C.C{H_2}.CO.C{H_3}} \\ 
  {\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,\,N{H_2}\,\,\,\,\,\,\,} 
\end{array}$  is
If the uncertainty in velocity and position of a minute particle in space are, $2.4 \times 10^{-26}\left(\, m\,s ^{-1}\right)$ and $10^{-7}\,( m )$ respectively. The mass of the particle in $g$ is $....$ (Nearest integer)

(Given : $h =6.626 \times 10^{-34} Js$ )

How the isomeric complexes $[Co(NH_3)_6][Cr(NO_2)_6]$ and $[Cr(NH_3)_6][Co(NO_2)_6]$ can be distinguished from one another by
If $k$ is rate constant and $t$ is time then the degree of dissociation for a substance undergoing decay with first order kinetics is
Hydrolysis of peroxo-disulphuric acid gives 
$\mathop {C{H_3} - }\limits_a \mathop {C{H_2} - }\limits_b \mathop {C{H_2} - }\limits_c \mathop {C{H_2} - }\limits_d F$

Arrange the hydrogens $a, b, c, d$ in decreasing order of their reactivities towards chlorination

For a phase change, ${H_2}O(l)\underset {{0^{\,o}}C,\,1\,bar} \longleftrightarrow {H_2}O(s)$
The mole fraction of water in $20\% $ aqueous solution of ${H_2}{O_2}$ is
A soft drink was bottled with a partial pressure bf $CO _{2}$ of $3$ bar over the liquid at room temperature. The partial pressure of $CO _{2}$ over the solution approaches a value of 30 bar when $44\, g$ of $CO _{2}$ is dissolved in $1\, kg$ of water at room temperature. The approximate $pH$ of the soft drink is............... $\times 10^{-1}$

(First dissociation constant of $H _{2} CO _{3}=4.0 \times 10^{-7}$$\log 2=0.3 ;$ density of the soft $\left.\operatorname{drink}=1\, g\, mL ^{-1}\right)$

The major product formed during the reaction of $1$ -methyl cyclopentene with  $CH_3CO_3H$ is