If the bond length of CO bond in carbon monoxide is $1.128 \mathop {\rm{A}}\limits^{\rm{o}}$, then what is the value of CO bond length in $\mathrm{Fe}(\mathrm{CO})_5$?

Which of the following reactants on reaction with conc. NaOH followed by acidification gives the following lactone as the only product?

$$ \text { The major products } \mathbf{P} \text { and } \mathbf{Q} \text { are } $$

The given graph represents the variation of Z (compressibility factor $=\mathrm{PV} / n \mathrm{RT}$ ) versus P , for three real gases $\mathrm{A}, \mathrm{B}$ and C . Identify the only incorrect statement.