Neco Model Questions Vol1 2025 Chemistry Question 15

Practice objective / multiple choice question 15 from the 2025 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 15 NECO_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

A 0.500 mol sample of a non‑volatile solute is dissolved in 1.00 kg of water. The solution's boiling point is observed to be 100.8 °C at 1 atm. Given the ebullioscopic constant of water Kb = 0.512 °C·kg mol⁻¹, calculate the van't Hoff factor i of the solute. Based on the value of i, indicate whether the solute is likely a nonelectrolyte, a 2‑ion electrolyte, or a 3‑ion electrolyte.

Answer Options

A. i ≈ 3.5; the solute is likely a 3‑ion electrolyte
B. i ≈ 1.0; the solute is likely a nonelectrolyte
Correct Answer C. i ≈ 3.1; the solute is likely a 3‑ion electrolyte.
D. i ≈ 2.0; the solute is likely a 2‑ion electrolyte
Correct Answer
C
Correct Option:
i ≈ 3.1; the solute is likely a 3‑ion electrolyte.

About This Question

This is Neco Model Questions Vol1 2025 Chemistry Question 15. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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