In Initial Steps of the Sol- Gel Process, a Reactive

question 42

Multiple Choice

In initial steps of the sol- gel process, a reactive metal is treated with an alcohol to form a metal alkoxide. The metal alkoxide is then combined with water to form the metal hydroxide. The metal hydroxide is not formed directly by reaction of the metal with water because .

• A) the direct reaction of a reactive metal with water will give a complex mixture of metal oxides and hydroxide
• B) finer particles are obtained in the two- step process
• C) the two- step process prevents oxidation of the metal to an unstable oxidation state
• D) the metal hydroxide formed in the two- step process is more soluble and is more easily utilized
• E) the alcohol stabilizes the metal hydroxide making it less susceptible to attack by the base added later

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Definitions:

M3

A gauge of monetary supply encompassing M2 as well as sizable time deposits, institutional money market funds, and additional significant liquid assets.

Double Coincidence

A situation in barter economies where two parties each possess an item the other wants, allowing for an exchange without the need for a common unit of value.

Small Denomination Time Deposits

Bank deposits that are held for a fixed term with a specified small minimum amount and earn interest over time.

Large Denomination Time Deposits

Time deposits in a bank or financial institution with a large minimum amount of money required, typically over $100,000, and a fixed term.