A. Main Answer:Thecompoundsamong the given options are:D) CH2 and O2, but not H2O.B. Explanation:To determine which of the options represent compounds, we need to understand the nature of compounds and elements.- **Compounds** are substances formed when two or more different elements chemically bond together in fixed ratios. They have unique chemical properties different from their constituent elements. For example, water (H2O) is a compound formed by the chemical bonding of hydrogen (H) and oxygen (O).- **Elements** are substances that consist of only one type of atom. They cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and carbon (C).Let's analyze the options:A) H2O, O2, and CH2:- H2O (water) is a compound.- O2 (oxygen gas) is a diatomic molecule consisting of twooxygenatoms, which are of the same element.- CH2 is a molecular formula, but it doesn't represent a specific compound. It could represent various organic compounds with different structures.B) H2O and O2:- H2O is a compound.- O2 is not a compound; it is a molecule consisting of two oxygen atoms of the sameelement.C) O2 and CH2:- O2 is not a compound, as explained above.- CH2 is not a specific compound; it represents a general molecular formula.D) CH2 and O2:- CH2 is not a specific compound.- O2 is not a compound.E) H2O and CH2:- H2O is a compound.- CH2 is not a specific compound.So, the correct answer is option D, as it includes CH2 and O2, both of which are not compounds but rather molecular formulas ormolecules.There for correct opption is D) CH2 and O2, but not H2O.Learn more aboutCompoundsbrainly.com/question/34711573#SPJ11...

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