Neco Model Questions Vol1 2018 Chemistry Question 39

Practice objective / multiple choice question 39 from the 2018 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Hard Difficulty

Question 39 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Elemental analysis of an unknown alcohol gives 52.2\% C, 13.3\% H and 34.5\% O by mass. The pure liquid boils at 78\,°C, the same temperature as ethanol. (a) Determine the molecular formula of the alcohol. (b) If 1.20\,g of the alcohol is completely combusted, what volume of O₂ (at STP) is consumed? Give your answer in litres to three significant figures.

Answer Options

A. (a) C₄H₁₀O \;(b) 2.45\,L

B. (a) C₂H₄O \;(b) 1.20\,L

C. (a) C₃H₈O \;(b) 2.10\,L

Correct Answer D. (a) C₂H₆O \;(b) 1.75\,L

Correct Answer

Correct Option:

(a) C₂H₆O \;(b) 1.75\,L

About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 39. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Hard .

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