Neco Model Questions Vol1 2018 Chemistry Question 6

Practice objective / multiple choice question 6 from the 2018 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2018 Chemistry Objective / Multiple Choice Medium Difficulty
Question 6 NECO_MODEL_QUESTIONS_VOL1 • 2018 • CHEMISTRY • objective

Benzaldehyde \(\mathrm{C_6H_5CHO}\) is first reduced with NaBH\(_4\) to give benzyl alcohol \(\mathrm{C_6H_5CH_2OH}\). The benzyl alcohol is then oxidised with Jones reagent (CrO\(_3\)/H\(_2\)SO\(_4\)) to form benzoic acid \(\mathrm{C_6H_5COOH}\). Determine the overall change in oxidation number of the carbon atom that was the carbonyl carbon in benzaldehyde.

Answer Options

A. +1
B. 0
C. +3
Correct Answer D. +2
Correct Answer
D
Correct Option:
+2

About This Question

This is Neco Model Questions Vol1 2018 Chemistry Question 6. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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