Which pair of reactants will undergo aldol condensation to produce pent-3-ene-2-one? A Propanone and ethanal B Methana and propanone C Two molecules of propanone D Methanal and ethanal E Two molecules of propanal

A - Propanone and ethanal.

Explanation:

Aldol condensation may be defiend as a reaction which involves an enol or an enolate ion with a carbonyl compound to form a beta-hydroxyaldehyde (β-hydroxyaldehyde or β-hydroxyketone), which is accompanied by dehydration to give a conjugated enone.

In this case, Propanone and ethanal will undergo condensation reaction to produce pent-3-ene-2-one.

It is important to note that propanone is an enol.

Therefore, the pair of reactants that will undergo aldol condensation to produce pent-3-ene-2-one? is Propanone and ethanal.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.