How are the following conversions carried out?

Ethyl magnesium chloride → Propane-1-ol.

Ethyl magnesium chloride (Grignard reagent) attacks on the carbon of the formaldehyde.(The partial positive and negative charge is because of the electronegativity difference). After the formation of the addition product, hydrolysis takes place which further results in the formation of propane-1-ol and Mg(OH)Cl as the byproduct.