Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is

A liquid was mixed with ethanol and a drop of concentrated H₂SO₄ was added. A compound with a fruity smell was formed. The liquid was :

In Cannizzaro reaction given below
2PhCHO $$\buildrel {\mathop {:OH}\limits^{\left( - \right)} } \over \longrightarrow $$ PhCH₂OH + $$PhC\mathop O\limits^{..} $$₂^(-)
the slowest step is :