GACE Chemistry 4

Question 1

In a galvanic (voltaic) cell, which electrode undergoes oxidation?

Accepted Answer

Anode

Answer

Oxidation (loss of electrons) always occurs at the anode in both galvanic and electrolytic cells.

Question 2

What is the VSEPR geometry of a molecule with 4 bonding pairs and 0 lone pairs around the central atom?

Accepted Answer

Tetrahedral

Answer

Four bonding pairs with no lone pairs arrange themselves into a tetrahedral geometry to minimize repulsion.

Question 3

Which colligative property explains why roads are salted in winter to prevent ice formation?

Accepted Answer

Freezing point depression

Answer

Salt dissolves in water and lowers its freezing point, preventing ice from forming at temperatures that would otherwise freeze pure water.

Question 4

Which of the following describes the process of nuclear fission?

Accepted Answer

A heavy nucleus splits into smaller nuclei and releases energy

Answer

In nuclear fission, a heavy nucleus such as uranium-235 splits into smaller fragments, releasing a large amount of energy.

Question 5

Which intermolecular force is responsible for the unusually high boiling point of water compared to other small molecules like H₂S?

Accepted Answer

Hydrogen bonding

Answer

Water molecules form strong hydrogen bonds with each other due to the highly electronegative oxygen atom bonded to hydrogen.

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