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BECE Science 2015 Paper

Question : 19

Total: 40

Solution:

Concept:

A chemical compound is a substance formed when two or more different elements are chemically combined.

Explanation:

Ammonia is

\mathrm{NH}_3

, made of nitrogen and hydrogen atoms chemically combined.

Aluminium, oxygen, and phosphorus are elements, not compounds.

Answer:

B. ammonia

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