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BECE Science 2021 Paper

Question : 8

Total: 40

Solution:

Concept:

In the systematic nomenclature of carbon oxides, the Roman numeral indicates the oxidation state of carbon.

Explanation:

\mathrm{CO}

, oxygen has an oxidation state of

-2

Let the oxidation state of carbon be

x

Then,

x + (-2) = 0

, so

x = +2

Hence, the systematic name is carbon (II) oxide.

This compound is commonly called carbon monoxide.

Answer:

B. Carbon (II) oxide

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