CH301 - Unit 2 Exam 1 Review

Front

What is an ionic compound?

Back

An ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding. Examples include NaCl and CaO.

Front

Which of the following is NOT an ionic compound: CaO, NaOH, BaCl2, Br2?

Back

Br2 is not an ionic compound; it is a diatomic molecule.

Front

Define polar covalent bond.

Back

A polar covalent bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms, leading to a dipole moment.

Front

What is resonance in chemistry?

Back

Resonance refers to the phenomenon where a molecule can be represented by two or more valid Lewis structures, indicating delocalized electrons.

Front

Which of the following does NOT exhibit resonance: C6H6, NO2-, O3, C2H4?

Back

C2H4 does not exhibit resonance; it has a fixed structure with no delocalized electrons.

Front

How do you classify a molecule as polar or non-polar?

Back

A molecule is classified as polar if it has a net dipole moment due to the presence of polar bonds and an asymmetrical shape; otherwise, it is non-polar.

Front

What is the molecular shape of ICl3?

Back

The molecular shape of ICl3 is T-Shape due to the presence of three bonding pairs and two lone pairs of electrons.

Front

What is the difference between polar and non-polar molecules?

Back

Polar molecules have an uneven distribution of electron density, resulting in a dipole moment, while non-polar molecules have an even distribution of electron density.

Front

What is the significance of molecular shape in chemistry?

Back

Molecular shape influences physical and chemical properties, including reactivity, polarity, phase of matter, color, magnetism, and biological activity.

Front

Define resonance structures.

Back

Resonance structures are different Lewis structures for the same molecule that show the delocalization of electrons.