Neco Model Questions Vol1 2018 Chemistry Question 19

Practice objective / multiple choice question 19 from the 2018 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Medium Difficulty
Question 19 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

When 2.00 g of an unknown alkane with molecular formula \(\mathrm{C}_{n}\mathrm{H}_{2n+2}\) is combusted completely in excess oxygen, 5.60 g of \(\mathrm{CO}_{2}\) and 2.40 g of \(\mathrm{H}_{2}\mathrm{O}\) are produced. Determine the value of \(n\) and give the empirical formula of the alkane.

Answer Options

A. n = 20; empirical formula CH₂
B. n = 21; empirical formula C₂H₅
C. n = 22; empirical formula CH₃
Correct Answer D. n = 21; empirical formula CH₂
Correct Answer
D
Correct Option:
n = 21; empirical formula CH₂

About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 19. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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