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Oxygen is absent in?

A. Kerosene

B. Soil

C. Glass

D. Cement

QUICK ANSWER…

A

DETAILS…

Oxygen is absent in kerosene.

Kerosene is a pure hydrocarbon with no oxygen present in its chemical formula.

It is an alkane with the chemical formula C₁₂H₂₆ to C₁₅H₃₂. This clearly shows that its chemical formula contains no oxygen.

Now for the right answer to the above question:

1. Option A is correct. the chemical formula for kerosene is C₁₂H₂₆ to C₁₅H₃₂.
2. Option B is incorrect. soil is basically made of silicon dioxide with the chemical formula = SiO₂.
3. C is not correct. glass is mainly made of silicon dioxide SiO₂.
4. D is not the correct answer. cement is made of limestone CaCO₃.

KEY-POINTS…

You may please note these/this:

• We assumed that the examiner intends us to identify the compound that does not contain oxygen.
• The chemical formula of all except kerosene contains oxygen.
• Kerosene has a range of chemical formulas which are C₁₂H₂₆ to C₁₅H₃₂.

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/ culled from 2021 JAMB-UTME CHEMISTRY question 12 /