Waec Model Questions Vol1 2022 Chemistry Question 13
Practice objective / multiple choice question 13 from the 2022 Waec Model Questions Vol1 Chemistry examination.
A 5.00 g sample of a pure primary alcohol with molecular formula CₙH₂ₙ₊₂O (molar mass 74 g mol⁻¹) is oxidised with excess acidic K₂Cr₂O₇. The alcohol is first converted to the corresponding aldehyde, which is then distilled and weighed (mass = 3.20 g). The aldehyde is subsequently oxidised further to the carboxylic acid, but this second oxidation is incomplete. Determine (a) the value of n (the number of carbon atoms in the alcohol) and (b) the percentage of the aldehyde that was further oxidised to the acid.
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About This Question
This is Waec Model Questions Vol1 2022 Chemistry Question 13. It is one of the objective questions from the 2022 Waec Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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