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Question 1:

Which of the following processes involves the separation of ions from an ionic compound when it dissolves in water?

A) Dissociation
B) Ionization
C) Evaporation
D) Precipitation

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Explanation: The correct answer is A) Dissociation. Dissociation refers to the separation of ions from an ionic compound when it dissolves in water. In this process, the solvent molecules surround and solvate the individual ions, allowing them to move freely in the solution.

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Question 2:

Which type of solute forms ions when it dissolves in water?

A) Molecular solute
B) Covalent solute
C) Ionic solute
D) Nonpolar solute

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Explanation: The correct answer is C) Ionic solute. Ionic solutes, which consist of ions held together by ionic bonds, dissociate into ions when they dissolve in water. This dissociation results in the formation of positive and negative ions in the solution.

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Question 3:

Which type of solute forms charged particles when it dissolves in water?

A) Molecular solute
B) Covalent solute
C) Ionic solute
D) Nonpolar solute

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Explanation: The correct answer is C) Ionic solute. When an ionic solute dissolves in water, it forms charged particles or ions. These ions can be positively charged (cations) or negatively charged (anions), depending on the composition of the ionic compound.

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Question 4:

Which of the following substances undergoes ionization when it dissolves in water?

A) Sugar (C6H12O6)
B) Hydrochloric acid (HCl)
C) Ethanol (C2H5OH)
D) Benzene (C6H6)

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Explanation: The correct answer is B) Hydrochloric acid (HCl). Hydrochloric acid is a strong acid that ionizes completely when it dissolves in water. It forms hydrogen ions (H+) and chloride ions (Cl-) in the solution.

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Question 5:

Which process involves the formation of ions from molecules when they dissolve in water?

A) Dissociation
B) Ionization
C) Evaporation
D) Precipitation

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Explanation: The correct answer is B) Ionization. Ionization refers to the formation of ions from molecules when they dissolve in water. This process typically occurs for molecular compounds that are capable of producing ions in solution, such as weak acids, weak bases, and some polar covalent compounds.