Neco Model Questions Vol1 2024 Chemistry Question 46

Practice objective / multiple choice question 46 from the 2024 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2024 Chemistry Objective / Multiple Choice Hard Difficulty
Question 46 NECO_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • objective

An unknown monohydric alcohol (A) reacts with excess sodium metal to produce 0.125 mol of hydrogen gas. When 5.00 g of A is oxidised with excess acidic \(\mathrm{KMnO_4}\), the only organic product isolated is an ester that boils at \(138^{\circ}\mathrm{C}\). The ester is known to be isoamyl acetate \(\left(\mathrm{C_7H_{14}O_2}\right)\). Determine the molecular formula of the alcohol and calculate the percent yield of the esterification reaction.

Answer Options

Correct Answer A. Molecular formula \(\mathrm{C_5H_{12}O}\); percent yield = 84 %
B. Molecular formula \(\mathrm{C_4H_{10}O}\); percent yield = 78 %
C. Molecular formula \(\mathrm{C_5H_{10}O}\); percent yield = 92 %
D. Molecular formula \(\mathrm{C_6H_{14}O}\); percent yield = 84 %
Correct Answer
A
Correct Option:
Molecular formula \(\mathrm{C_5H_{12}O}\); percent yield = 84 %

About This Question

This is Neco Model Questions Vol1 2024 Chemistry Question 46. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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