Test Index

JAMB Chemistry 2018 Paper

Question : 49

Total: 87

The constituent common to duralumin and alnico is

Solution:

Concept:

The common metal present in both duralumin and alnico is aluminium.

Explanation:

Duralumin is an alloy composed mainly of

\mathrm{Al}

\mathrm{Cu}

\mathrm{Mg}

, and

\mathrm{Mn}

Alnico contains

\mathrm{Al}

\mathrm{Ni}

\mathrm{Co}

, and

\mathrm{Fe}

Comparing both alloys, the constituent found in each is

\mathrm{Al}

Therefore, the common constituent is aluminium.

Answer:

\mathrm{Al}

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