Igcse Model Questions Vol1 2025 Chemistry Question 31

Practice objective / multiple choice question 31 from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 31 IGCSE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective

A colourless liquid X has a molar mass of 46 g mol⁻¹. When 0.10 mol of X is treated with excess NaOH, a salt is formed. When 0.10 mol of X is heated with concentrated H₂SO₄, a gas Y is released. When 0.10 mol of Y is passed into BaCl₂ solution, a white precipitate forms which dissolves on heating. Identify X and Y, give the molecular formula of X, and state the type of reaction that occurs with NaOH.

Answer Options

A. X is methanol, molecular formula CH3OH; Y is carbon dioxide; the reaction with NaOH is an acid‑base neutralisation.
B. X is formic acid, molecular formula HCOOH; Y is carbon monoxide; the reaction with NaOH is a condensation reaction.
Correct Answer C. X is formic acid, molecular formula HCOOH; Y is carbon dioxide; the reaction with NaOH is an acid‑base neutralisation.
D. X is acetic acid, molecular formula CH3COOH; Y is carbon monoxide; the reaction with NaOH is an acid‑base neutralisation.
Correct Answer
C
Correct Option:
X is formic acid, molecular formula HCOOH; Y is carbon dioxide; the reaction with NaOH is an acid‑base neutralisation.

About This Question

This is Igcse Model Questions Vol1 2025 Chemistry Question 31. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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