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JAMB Chemistry 2015 Paper

Question : 53

Total: 64

Solution:

Concept:

A molecular formula shows the actual number of atoms of each element in one molecule.

Explanation:

Compare each option with the given formula

\mathrm{C_2H_6O}

Ethanol has the molecular formula

\mathrm{C_2H_6O}

, so it matches exactly.

Propanal is

\mathrm{C_3H_6O}

, methanoic acid is

\mathrm{CH_2O_2}

, and glucose is

\mathrm{C_6H_{12}O_6}

None of these other formulas equals

\mathrm{C_2H_6O}

Answer:

B. ethanol

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