Dry distillation of calcium acetate and calcium formate forms:

Which of the following reactions cannot be used to prepare Benzaldehyde?

The most suitable reagent for the conversion of $RCH_2OH \to RCHO$ is

Identify $Z$ in the following sequence of reactions.
$C_2H_4Br_2$ $\xrightarrow[\text{(ii) } NaNH_2]{\text{(i) alc- } KOH} X$ $\xrightarrow[\text{Red hot}]{\text{Fe tube, } 873 \ K} Y$ $\xrightarrow[\Delta]{\left(CH_3CO\right)_2O / \text{Anhyd-} AlCl_3} Z$

Which of the following represents the Etard reaction?

The major product of the following reaction is:
$CH_3CH_2CH=CH_2$ $\xrightarrow[Rh \ \text{catalyst}]{H_2/CO}$