The Presence of Which of the Following Cations Results in Hard

question 30

Multiple Choice

The presence of which of the following cations results in hard water?

• A) Ca²⁺
• B) Fe³⁺
• C) Mg²⁺
• D) any of these

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Definitions:

Terminate

To bring to an end or to conclude something such as an agreement, employment, or process.

Principal Duty

The main or most important obligation that a party has under a contract or agreement.

Reimburse

To pay back someone for expenses they have incurred.

Gratuitous Agency

Gratuitous agency refers to an arrangement where an agent acts on behalf of a principal without receiving any compensation for their services, often based on personal or familial relationships.