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JAMB Chemistry 2011 Paper

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Question : 39

Total: 47

At 25^o and zymase as catalyst,

C₆H₁₂₆ → 2C₂H₅OH + 2CO₂ + energy

The reaction above represented by the equation above is useful in the production of

propanol
butanol
methanol
ethanol

Solution:

Concept:

The equation represents alcoholic fermentation of glucose by zymase to produce ethanol.

Explanation:

The reaction is:

\mathrm{C}_6\mathrm{H}_{12}\mathrm{O}_6 \xrightarrow{\text{zymase}} 2\mathrm{C}_2\mathrm{H}_5\mathrm{OH} + 2\mathrm{CO}_2 + \text{energy}

\mathrm{C}_2\mathrm{H}_5\mathrm{OH}

is ethanol.

Therefore, this fermentation process is useful in the production of ethanol.

Answer:

D. ethanol

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