Which of the Following Compounds Was Used by the Ancient

question 9

Multiple Choice

Which of the following compounds was used by the ancient Egyptians and is still used today to remove visible impurities in water?

• A) Sand (SiO₂)
• B) Aluminum(III)hydroxide (Al(OH)₃)
• C) Slaked lime (Ca(OH)₂)
• D) Alum (KAl(SO₄)₂)
• E) Chlorine (Cl₂)

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Definitions:

Average Propensity

The ratio of total spending (consumption or saving) to total income, indicating how income is distributed across different economic activities.

Marginal Propensity

The measure of how much consumption changes with a change in disposable income, indicating the proportion of additional income that is spent on consumption.

Consumption Spending

The total value of all goods and services consumed by households over a specified period.

Marginal Propensity

The ratio of the change in an economic variable (such as consumption or saving) in response to a change in another variable (such as income).