Even While the Sun Is Still on the Main Sequence

question 69

Multiple Choice

Even while the Sun is still on the main sequence, it may eventually threaten life on Earth due to its

• A) increasing size.
• B) increasing luminosity.
• C) decreasing luminosity.
• D) more energetic solar flares.
• E) decreasing size.

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Definitions:

Aldol Product

A compound produced by an aldol condensation reaction, typically involving the formation of a β-hydroxy ketone or aldehyde.

4-methylpentanal

An organic compound, specifically an aldehyde, with the chemical formula C6H12O, characterized by a methyl group attached to the fifth carbon of a pentanal chain.

Sodium Hydroxide

A highly caustic and strong base used in many industries; it is also known as lye or caustic soda.

α,β-unsaturated Aldehyde

An organic compound with a double bond between the alpha and beta carbon atoms and a carbonyl group at the alpha position.