Portage Learning Organic Chemistry CHEM 219 | Module 1 Exam | Questions & Verified Answers | A+ Graded | 2025/2026 Edition
Section 1: Introduction
This document includes all the latest versions of the Module 1 Exam for CHEM 219 – Organic Chemistry from Portage Learning, fully updated for the 2025/2026 academic year. It covers essential topics such as bonding and structure, hybridization, Lewis structures, formal charges, resonance, and molecular geometry, aligned with foundational concepts in organic chemistry. Each version contains 100% verified correct answers, making this A+ graded bundle the perfect study guide for mastering the first module of the course.
Section 2: Exam Questions and Answers
Format: Multiple-choice and structural reasoning questions
• Four answer choices per question (A–D) • Correct answer highlighted • Includes key explanations for orbital theory, electron movement, and molecular structure interpretation
- What type of bond is formed by the overlap of two p orbitals?
- Which hybridization occurs in a carbon atom with a triple bond?
(a) Sigma bond (b) Pi bond (c) Hydrogen bond (d) Ionic bond Pi bond Explanation: Pi bonds result from the side-to-side overlap of p orbitals, typically seen in double or triple bonds.
(a) sp (b) sp² (c) sp³ (d) sp³d sp 1 / 2
Explanation: sp hybridization involves two p orbitals and one s orbital, forming two pi bonds and one sigma bond in a triple bond.
- What is the formal charge on a carbon atom with 4 bonds and no lone pairs?
(a) +1 (b) 0 (c) -1 (d) +2
Explanation: Formal charge = valence electrons (4) - non-bonding electrons (0) - ½ bonding electrons (8) = 0.
- Which molecule has a linear geometry?
- What is the total number of valence electrons in a CH₃Cl molecule?
(a) CH₄ (b) H₂O (c) CO₂ (d) NH₃ CO₂ Explanation: CO₂ has two double bonds and no lone pairs on the central carbon, resulting in a linear shape (180°).
(a) 14 (b) 16 (c) 18 (d) 20 14
Explanation: C (4) + 3H (1 each = 3) + Cl (7) = 14 valence electrons.
- Which structure contributes to the resonance of benzene?
- / 2
(a) Single bonds only (b) Alternate double and single bonds (c) Triple bonds (d) No resonance Alternate double and single bonds Explanation: Benzene’s resonance involves two Kekulé structures with alternating double bonds.