Quiz on Electromeric Effect, Resonance, and Steric Effects

What is the electromeric effect primarily associated with?

• Breaking of sigma bonds

• Formation of ionic bonds

• Transfer of electrons

• Transfer of protons

Which of the following best describes resonance?

• A type of covalent bond

• Formation of ionic compounds

• Delocalization of electrons across multiple structures

• A single Lewis structure representation

What symbol is used to represent resonance structures?

• Curved arrow (↗)

• Single arrow (→)

• Double-headed arrow (↔)

• Dotted line (⋅)

In tautomerism, what primarily differentiates the tautomers?

• Type of hybridization

• Number of atoms

• Presence of lone pairs

• Position of double bonds

What is steric hindrance?

• Attraction between electrons

• Repulsion due to spatial arrangement of atoms

• Formation of hydrogen bonds

• Stabilization of resonance structures

Which factor does NOT affect steric hindrance?

• Distance between atoms

• Orientation of the molecule

• Size of atoms/groups

• Temperature of the reaction

What is the consequence of steric inhibition of resonance (SIR)?

• Enhanced acidity of compounds

• Formation of new bonds

• Decreased electron delocalization

• Increased resonance stabilization

Which of the following is a classic example of resonance?

• Benzene (C₆H₆)

• Methane (CH₄)

• Ethanol (C₂H₅OH)

• Acetic acid (CH₃COOH)

What is the primary structural requirement for tautomerism?

• Presence of a triple bond

• Presence of a double bond

• Presence of at least one α-hydrogen atom

• Presence of a carbonyl group

Which of the following statements about resonance energy is true?

• It indicates the stability of the resonance hybrid.

• It is the energy of the most stable resonance structure.

• It is always zero for stable molecules.

• It is the energy required to break all bonds in a molecule.