The More One Practices Playing the Piano, the Prettier It

question 33

Multiple Choice

The more one practices playing the piano, the prettier it sounds and the more they enjoy listening to the music they play, which encourages them to practice even more, thus increasing their skill, beauty of the music, and their appreciation of playing and listening. This is a good example of which of the following?

• A)Balancing loop
• B)Reinforcing loop
• C)Concertive loop
• D)Didactic loop

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Definitions:

Self-condensation

A reaction in which a molecule undergoes condensation with itself to form a larger molecule, often in the presence of a catalyst.

Ester

Organic compounds derived from an acid where at least one –OH (hydroxyl) group is replaced by an –O– (alkoxy) group.

Aldol Reaction

A type of organic reaction where an enol or an enolate ion reacts with a carbonyl compound to form a beta-hydroxyaldehyde or beta-hydroxyketone, followed by dehydration to give a conjugated enone.

Crossed Aldol Condensation

A chemical reaction involving two different carbonyl compounds to form a β-hydroxyketone or an α,β-unsaturated ketone under basic or acidic conditions.