Chemistry Quiz

Nomenclature of Covalent Compounds: Which of the following is incorrectly named?

• CO₃²⁻: Carbonate ion

• CO₂: Carbon dioxide

• CH₄: Methane

• PO₄³⁻: Phosphide ion

Aufbau, Hund, & Pauli Theory: The configuration 1s²2s¹2p⁶3s³ violates which rules?

• Pauli only

• Aufbau, Hund, and Pauli

• Aufbau only

• Aufbau and Pauli

Electron Configurations Without Exceptions: What is the correct electronic configuration of titanium (Ti)?

• [Ar]4s²3d²

• [Ar]3s²3d²

• [Ar]3s²4d²

• [Kr]4s²3d²

Bond Polarity: Rank the bonds in CH₃CH₂OH by polarity: C-H, C-O, O-H.

In CH₂O, what are the formal charges on carbon and oxygen?

• +1 and -1

• 0 and 0

• -1 and +1

• 0 and -1

What kind of carbon-carbon bond is in C₂H₄?

• Double

• Triple

• Single

• Ionic

Which species exhibits resonance?

• HCN

• O₃

• CO₃²⁻

• b and c

In XeF₂, how many lone pairs are around the central atom?

• 2

• 5

• 4

• 3

Which species has bond angles slightly less than 109.5°?

• CH₃⁺

• I₃⁻

• HOCl

• O₃

Which molecule is planar?

• SO₃²⁻

• H₃O⁺

• NO₃⁻

• NH₃